Marines


Expeditions with MCUP

Marine Corps University Press logo
Marine Corps University Press
Quantico, Virginia

Expeditions with MCUP


Floating Red Crosses

An Exploration into the Global Hospital Ship Ecosystem Using Open-Source Data

Jonathan Robinson

11 March 2026

https://doi.org/10.36304/ExpwMCUP.2026.03

PRINTER FRIENDLY PDF
EPUB
AUDIOBOOK

APPENDIX TABLE

 

Abstract: This article explores the substantial and growing ecosystem of 138 oceangoing and riverine hospital ships that are currently in use around the world today from open sources. Providing a data-driven baseline about the extent of this ecosystem, five key trends emerge: that most active vessels are found in Asia and South America; that most active vessels operate in a single context, while a small number conduct multinational maritime health engagement; that most active vessels operate on rivers or inland waterways; that most active vessels are operated by nonstate entities; and that most active vessels have been developed in the past 25 years.

 

Keywords: hospital ships, medical ships, floating hospital, maritime health engagement, maritime medical diplomacy, soft power, humanitarian response, Peace Ark, USNS Mercy, USNS Comfort

 

Introduction

In May 2025, news broke that the People’s Republic of China (PRC) People’s Liberation Army Navy’s (PLAN) third Type 920 hospital ship, Auspicious Ark, had conducted its first official exercise in the Yellow Sea.[1] This vessel comes 15 years after its first sister ship, Peace Ark, conducted its first maritime global health engagement mission in 2010 and a year after its second sister ship, Silk Road Ark, completed its first named mission to PLA positions in the South China Sea in the summer of 2024.[2] This ship now brings the number of hospital ships currently in use by the PLAN to 12 vessels, far exceeding the U.S. Navy’s 2 aging hospital ships commissioned in the mid-1980s, USNS Mercy (T-AH 19) and USNS Comfort (T-AH 20), and the 3 Bethesda-class expeditionary medical ships currently under development.[3]

Much of the recent discourse around hospital ships has focused on the United States’ and PRC’s hospital ships, especially their capacity for supporting military personnel in war, how they have been used to respond to crises, or how effective their global maritime health engagement has been.[4] However, these discussions often overshadow the wider context of a substantial and growing ecosystem of hospital ships in use around the world today in addition to those of the United States and the PRC. This study attempts to address this gap by using publicly available information to provide a data-driven baseline about the extent of state-run and non-governmental organization (NGO)-operated hospital ships currently in use today.

From these open sources, this study found 138 vessels that were active as hospital ships around the world at the time of writing. From this data, five key trends could be identified:

  • Most currently active hospital ships in the world are found in Asia and South America.
  • Most currently active hospital ships in the world operate in a single context, but a small number conduct multinational maritime health engagement.
  • Most currently active hospital ships in the world are riverine vessels.
  • Most currently active hospital ships in the world are operated by nonstate entities.
  • Most currently active hospital ships in the world have been developed in the past 25 years.

 

With at least 14 hospital ships under development or in a conceptual phase found during the study, this extensive ecosystem shows no sign of slowing in the near future.

Such an ecosystem continues to raise important questions about the complexity of the future maritime medical operating environment during peacetime and as the world enters an era of strategic competition. Therefore, this article hopes to be of use to both military and civilian medical professionals as well as academics who seek a better knowledge about the current extent of maritime medical platforms present in the world today. To start, this article will outline what hospital ships are before introducing the method used to collect information during this study and then presenting the findings based on the data.

 

What Are Hospital Ships?

Before this article progresses, it is important to define what hospital ships are, as they occupy a specific legal space compared to other types of warships that have medical capabilities onboard. In peacetime, hospital ships can be defined as any vessel being operated as such as long as its operating entity is in line with relevant peacetime maritime laws and conventions. However, during conflict, there are specific parameters outlined in international law that govern what military and civilian ambulance, hospital, medical, or medical transport ships should look like and how they should operate. This includes declared neutral parties as well as belligerents. These parameters that govern these types of vessels, which will be summarized as hospital ships for the purposes of simplicity for this article, can be summarized as follows:

  • All ship exterior surfaces are painted white, with one or more dark red crosses displayed on the sides and horizontal surfaces, and a white flag with a red cross flown at the mainmast.
  • The ship is specifically and solely used to assist the wounded, sick, and shipwrecked regardless of nationality.
  • The ship may not be used to commit acts harmful to the enemy for the duration of hostilities, even if they cease to be used as hospital ships.
  • The ship’s religious, medical, and hospital personnel and their crew shall be respected and protected. They may not be attacked or captured, except under extremely strict conditions.
  • The ship’s name and description are notified to all parties to a conflict at least 10 days before they are deployed.[5]

 

These parameters were first developed in the First Hague Peace Conference of 1899, before being further elaborated in the Hague Convention on Hospital Ships in 1904 and the 10th convention of the Second Hague Peace Conference in 1907.[6] By the Second Geneva Convention of 1949, its additional protocols of 1977, and further iterations of these conventions in the San Remo Manual on International Law Applicable to Armed Conflicts at Sea of 1994, the rules defining and governing what hospital ships are and how they should be used in wartime were codified by almost every nation on earth.[7] However, multiple vessels outlined in this report would not currently conform to these parameters if a conflict were to break out.

Away from these legal developments, the use of hospital ships has a long history. Records dating back to the Athenian and Roman periods detail the ships Therapia and Aesculapius being used as hospital ships in the third and fourth century BCE.[8] In more recent times, hospital ships were put into service by the English Royal Navy in the seventeenth century with HMS Goodwill in 1608, while in the mid-1800s, USS Red Rover (1859) was used as a medical ship by Union forces during the American Civil War.[9] However, it was not until 1896 that the United States first developed a dedicated hospital ship, the U.S. Army hospital ship (USAHS) Relief, which was soon transferred to the U.S. Navy as USS Relief in 1902.[10] By comparison, the PRC developed its first-ever hospital ships in 1991—Nan Kang (832) and Bei Kang (833)—almost 80 years after the United States did.[11]

 

Figure 1. Timeline of key dates in the development of hospital ships in history

Source: courtesy of the author.

 

The Method Used in This Study

The following section will describe the three-step systematic method that was developed for this study to support the gathering of information using publicly available sources about hospital ships currently in use in the world today. The first data collection step was to use The Military Balance 2025 to provide a baseline guide about which countries in the world officially operate hospital ships.[12] Using this credible and authoritative report, a total of 33 vessels currently operated by 10 countries’ armed forces were recorded (table 1). No hospital ships from NGOs were listed.

 

Table 1. Hospital ships listed in The Military Balance 2025

Number of vessels found

Number of countries associated with operating hospital ships

Specific details

33 vessels

10 countries

Bolivia (2 vessels), Brazil (5), Burma (1), Indonesia (4), Peru (5), PRC (9), Russia (3), United Kingdom (1), United States (2), and Vietnam (1)

Source: courtesy of the author.

 

The second data collection step was to conduct a broad unstructured English-language search of online secondary sources for information on hospital ships in use in various countries around the world. To help with systematizing this search, the keyword “hospital ship” was combined with each of the 195 officially recognized countries in the world (e.g., “hospital ship Bolivia”) and inputted into the internet search engine Google.[13] The results that came up were then investigated for references to hospital ships and information about each vessel recorded. Due to time constraints, only records from the first two pages of each Google search were included in this study. The search was conducted between October 2024 and 1 March 2025 from a U.S. location. This step of the method resulted in discovering 173 vessels operated by 70 entities (table 2).

 

Table 2. Hospital ships found during Google search, 2024–25

Number of vessels found

Number of countries associated with operating a hospital ship

Number of NGOs associated with operating a hospital ship

Specific details

173

20

40

Countries: Bolivia (2 vessels), Brazil (11), Burma (3), Chile (1), India (1), Indonesia (4), Japan (1), Nigeria (1), Peru (14), Philippines (2), Portugal (1), PRC (15), Russia (5), South Korea (6), Spain (2), United Arab Emirates (1), United Kingdom (1), United States (5), Venezuela (1), Vietnam (1).

 

NGOs: Amazon Medical Ministries (1), Aresa Shipyard (2), Beijing Pinglan Public Welfare Foundation (1), Center for Northeast Studies and Policy (C-NES) (15), Central Brazil Mission (2), DoctorShare NGO (4), Elpis Hospital Ship Association (1), Friendship NGO (8), FXB Myanmar (2), Grandi Navi Veloci (1), Hope for Brazil (1), Impact Foundation (1), Irrawaddy River Doctors (2), Italo-Colombian Foundation of Mount Tabor (1), Karuna Trust (1), Lake Tanganyika Floating Health Clinic (1), Marine Reach Global (1), Medical Ministry International (1), Mercy Ships (5), Mision a Bordo (1), Mission Ship (1), Order of Friars Minor (OFM) Fraternitas Foundation (3), Pacific Reach (3), Pan Entertainment Production Company (1), Peace Winds Japan (2), Project Amanas (1), Rotary Club Egypt (1), Samaritan’s Purse (1), Seacoast Mission (2), Smile Foundation India (1), Sociedade Biblica Do Brazil (3), Southern Health Improvement Samity (SHIS) Foundation (4), St Francis Leprosy Guild (1), United Methodist Church (1), University of Western Para State (1), Vine Trust (4), World Vision International (1), Worldwide Hospitals (2), Yayasan Mega Gotong Royong (1), Youth With a Mission (9).

Source: courtesy of the author.

 

The third step of the method was to corroborate the identified information and to categorize the information for inclusion in the study. This was completed in two stages. If information about a hospital ship was found in both step one and step two, it was included in the study as an active vessel without further investigation, as the information was deemed to have been corroborated, current, and unlikely to have been fabricated given its inclusion in a definitive source, The Military Balance 2025.

If information on a vessel was found in step two only, a second stage would find additional credible sources detailing whether the vessel was active either from primary sources (i.e., entities that operated the vessel, such as the website of a country’s navy or an NGO) or multiple credible secondary sources about the vessel. As a result of this stage, the 173 vessels that were found from step two were categorized at the time of writing as follows: 138 vessels were active; 21 vessels were no longer in use; and 14 vessels were under development or in a conceptual phase. These vessels, which are depicted in figure 2, correspond with information in table 3, which can be found in the appendix of this article.

 

Figure 2. Depictions of hospital ships found in this study

Source: courtesy of the author.

 

Limitations of the Method

It is recognized that this study’s method and findings have limitations. The author acknowledges that significant bias is present when using open sources, such as what information is presented from search engine optimization algorithms or what information an entity wants to present publicly. The location of where the search took place (i.e., a U.S.-based internet search) could also affect what information is found, and additional searches from other locations around the world may result in slightly different findings.

The author recognizes that using English-language searches for vessels and only employing one keyword can also affect what could be found for this study. This study did not try to limit the number of vessels that were found based on a strict naming convention (i.e., only vessels described as a “hospital ship”). Given that in peacetime, hospital ships can be defined as being operated by how an entity sees fit, any medical- or health-focused vessel that was found from the open-source search from the keyword “hospital ship [+ country]” was included regardless of its name or size. As a result, the study found vessels that were described or named 33 different ways and included a range of vessels as small as 52 feet to as large as 894 feet.[14] That said, it is the hope of the author that in the future this study could be improved by using different languages and additional keywords, such as the 33 different ways hospital ships were referred to, to find additional information about hospital ships. This research was always designed to be an initial attempt at mapping hospital ships in use around the world today.

This study also only looked at hospital ships that were defined as primarily or solely being used for medical use. This study did not include dual-use ships that have a primary military role but also have the ability to be converted for use in a secondary medical role.[15] Recent examples of such ships include the French Navy’s landing helicopter deck Dixmude (L9015) and the Italian Navy’s logistic support ship Vulcano (A5335), both of which were converted from their routine military roles to be used as temporary hospitals during the Israel–Gaza conflict in 2023–24.[16] While these vessels can provide an important medical capability in times of war and peace, the investment in such dual-use ships is not primarily for health purposes and so if included in this study they could potentially skew the results. The topic of dual-use vessels and how they augment the existing hospital ship ecosystem or conduct global health engagement missions such as the U.S. Navy’s annual Pacific Partnership deployment could be the focus of a future study.

Finally, this study did not attempt to compare or contrast the medical capabilities of each vessel, as the author is not a military medical specialist. Instead, this study aims to provide a roadmap for readers to understand the context of the current hospital ship ecosystem and identify areas for further investigation. As no study is locked in time, it should be updated in the future to ensure the continued validity of the findings or develop new insights.

Despite the abovementioned limitations, the data produced by this study could still be considered useful because it provides a window into the modern global ecosystem of dedicated hospital ships that are solely or primarily used for medical purposes around the world today.

 

Trends from the Data

From the collected data, five trends become apparent:

  • Most currently active hospital ships in the world are found in Asia and South America.
  • Most currently active hospital ships in the world operate in a single context, but a small number conduct multinational maritime health engagement.
  • Most currently active hospital ships in the world are riverine vessels.
  • Most currently active hospital ships in the world are operated by nonstate entities.
  • Most currently active hospital ships in the world have been developed in the past 25 years.

 

Each of these trends will now be expanded below.

 

Most Currently Active Hospital Ships in the World Are Found in Asia and South America

When exploring the data, notable patterns emerge of where hospital ships are in the world. Of the 138 active vessels found for the study, 88 percent (121) operate in the U.S. Indo-Pacific Command (INDOPACOM) (71) or U.S. Southern Command (SOUTHCOM) (40) areas of responsibility. The remaining 12 percent (17) operate in the U.S. Africa Command (AFRICOM) (7), U.S. Europe Command (EUCOM) (2), and U.S. Northern Command (NORTHCOM) (2), or they operate across multiple combatant commands (CCMD) (6).

Exploring this breakdown in more detail, 54 percent (75) of the active hospital ships found for this study operate in just four countries; Brazil, India, Peru, and the PRC. Brazil is the country where the largest number of hospital vessels are flagged and operate, with 22 state and nonstate riverine vessels conducting medical support along tributaries of the Amazon. With the Brazilian Navy developing another vessel—FPSO Anna Nery—this number is likely to increase in the future.[17]

India has 21 flagged nonstate medical clinic boats that operate along rivers and estuaries in the country since 1997, when the Southern Health Improvement Samity’s M. V. Dominique was first put into service. The Indian Navy is also developing an unnamed national hospital ship that would represent the first state-run oceangoing hospital ship in the country.

Peru has 17 flagged state and nonstate medical vessels operating on inland waters in the country, including the Peruvian Coast Guard’s BAP Puno (ABH 306), the oldest functional hospital ship in the world (dating from 1872) that operates on Lake Titicaca.[18]

Finally, the PRC operates 13 medical vessels, 12 operated by the PLAN and one likely operated by the People’s Armed Force Maritime Militia, Yanyu 861. A further unnamed medical rescue ship is being developed by the Beijing Pinglan Public Welfare Foundation, which would be the first NGO vessel operated by the PRC.[19]

A further 20 percent (28) of active vessels found in the study operate or are flagged in four other countries—Bangladesh (8), Indonesia (8), Burma (7), and South Korea (5)—while the remaining 26 percent are flagged to 21 other countries (35) or could not be identified (1). For a summary of the above, see figure 3.

 

Figure 3. Breakdown of active hospital ships by CCMD based on flag of the vessel

Source: courtesy of the author.

 

Most Currently Active Hospital Ships in the World Operate in a Single Context, but a Small Number Conduct Multinational Maritime Health Engagement

When exploring the 138 active hospital ships found for this study, the vast majority appear to operate in a single context, with 86 percent (118) routinely focused on serving domestic populations within a specific country. This includes 69 vessels that are run by NGOs and 49 vessels that are state-run, the latter of whose use of medical and social service programs is aimed at reenforcing state authority in remote communities. Examples of these types of vessels include the Brazilian Navy’s five hospital assistance ships (NAsH), the Chilean Navy’s dental medical patrol boat Cirujano Videla (PMD 74), the Peruvian Navy’s 13 itinerant social action platform (PIAS) vessels, and South Korea’s five hospital ships run by four civilian municipal governments.

The remaining 14 percent (20) conducted maritime health engagement across multiple countries in the world. Of these, 16 vessels are state-operated by the Indonesian Navy (4), the PLAN (4), the Spanish Social Institute of the Navy (2), the U.S. Navy (2), the Vietnam People’s Navy (2), the United Arab Emirates’ (UAE) Ministry of Health and Prevention (1), and the British Royal Navy (1). The five remaining vessels are run by five NGOs; the oceangoing Global Mercy and Africa Mercy, operated by Mercy Ships in West and South Africa; the oceangoing Elpis, operated by the Elpis Hospital Ship Association in the Mediterranean, Gambia, and Madagascar; the riverine vessel Mau Pata, operated by the Medical Ministry International between Colombia, Peru, and Brazil; and the Pacific Hope, an oceangoing vessel based in Mexico that has conducted health missions to the Caribbean with Marine Reach Global.

Exploring the state-run vessels that conduct multinational maritime health engagement missions in more detail, a relative newcomer to conducting health missions across multiple countries in the world is the Indonesian Navy, whose four vessels—KRI dr. Soeharso (990), KRI dr. Wahidin Sudirohusodo (991), KRI dr. Radjiman Wedyodiningrat (992), and KRI Semarang (594)—have conducted overseas medical missions to Egypt, Timor Leste, Singapore, Fiji, Papua New Guinea, the Solomon Islands, and Vanuatu in recent years.[20]

The PLAN’s most high-profile hospital ship, Peace Ark, has conducted 10 maritime global health engagement missions around the world since 2010. Through the so-called “Harmonious Missions” and a disaster response to the Philippines in 2013, the vessel has steadily increased its port visits to countries on six of the world’s seven continents in the past 15 years.[21] Three other PLAN hospital ships—Silk Road Ark, You’ai (861), and Youhao (862)—have conducted health engagements closer to home for PLA personnel on the disputed Spratly and Paracel (Nasha and Xisha) islands in the South China Sea.[22]

Spain’s Social Institute of the Navy operates two medical ships on behalf of the country’s Ministry of Inclusion, Social Security, and Migration since the early 2000s. The ships Esperanza Del Mar and Juan De La Cosa are designed to support Spain’s industrial fishing fleets around the Azores, the Canary Islands, and Saharan and Mauritian fishing grounds, as well as the northern Atlantic Ocean.

Another newcomer to multinational maritime health engagement, the UAE converted the roll-on/roll-off container ship SSF Ania for use as a hospital ship during the country’s response to treat civilian casualties of the Israel–Gaza conflict in 2024.[23]

The Royal Navy has operated the Royal Fleet Auxiliary (RFA) Argus (A135) as its primary casualty receiving ship since 1982, when it was deployed during the Falklands War. Since this time, the vessel has supported British military operations in the Middle East, the Adriatic Sea, and Sierra Leone, as well as disaster response operations in the Caribbean and West Africa.[24]

The U.S Navy’s two hospital ships—Mercy and Comfort—have conducted disaster response missions since they were put into service in the mid-1980s.[25] In addition, they have conducted near-annual Continuing Promise and Pacific Partnership global health engagement missions in the SOUTHCOM and INDOPACIFIC areas since 2000.[26]

Finally, similarly to the PLAN’s use of some of its hospital ships, the Vietnam People’s Navy hospital ship Khanh Hoa 01 largely operates in the South China Sea, supporting troops and fishing fleets in the disputed Spratly (Truong Sa) Islands.[27] The vessel also took part in maritime exercises in Indonesia in 2016.[28] For a summary of the above, see figure 4.

 

Figure 4. Depiction of where state- and NGO-run hospital ships operate in the world

This map also includes entities that conduct multinational maritime health engagement. Note: not all U.S Navy and PLAN maritime global health engagements are shown on the map due to the volume of visits around the world.
Source: courtesy of the author.

 

Most Currently Active Hospital Ships in the World Are Riverine Vessels

Of the 138 active vessels found for this study, 57 percent (79) were riverine-based hospital ships. A further 39 percent (54) routinely operated at sea, both in territorial waters and across open ocean, while 4 percent (5) operated on two of the world’s largest lakes: Lake Titicaca in South America (3) and Lake Victoria in East Africa (2). Even when looking at the 14 vessels under development or in the conceptual phase for the future, 12 of which will be seagoing or oceangoing vessels, this trend is unlikely to reverse soon. A further two vessels currently under development will operate on inland waterways in Brazil and Lake Tanganyika in East Africa.

Fifty-four percent of the 79 riverine hospital ships are flagged and operate in the SOUTHCOM area (43), while the remaining 46 percent are found in the INDOPACOM (35) and AFRICOM (1) areas. No active riverine vessels were found in the EUCOM, NORTHCOM, or U.S. Central Command (CENTCOM) areas. When exploring the 54 seagoing or oceangoing vessels, this trend is reversed, with 67 percent (36) of vessels flagged and operating in the INDOPACIFIC area. A further 22 percent of seagoing vessels conduct operations in the AFRICOM (4), SOUTHCOM (4), EUCOM (2), and NORTHCOM (2) areas. The remaining 11 percent (6) operate across multiple CCMDs. For a depiction of the above, see figure 5.

 

Figure 5. Types of active and retired hospital ships found for this study, organized by CCMD

Source: courtesy of the author.

 

Most Currently Active Hospital Ships in the World Are Operated by Nonstate Entities

Fifty-four percent (74) of the 138 active vessels found for this study were operated by 32 civilian nonstate entities, while the remaining 46 percent (64) were operated by 25 civilian and military state entities. Looking at the future, this trend appears set to continue, as one-half of the 14 vessels currently under development or in a conceptual phase will likely be run by state entities and the other one-half operated by NGOs.

However, when exploring the vessels operating within the different CCMDs, more nuanced details emerge. Of the 65 hospital ships that currently operate in the INDOPACOM area, 70 percent (45) were run by NGOs, while just 30 percent (20) were run by state entities. A similar picture is seen in the AFRICOM and NORTHCOM areas, where five of the six vessels found were operated by NGOs.

In the SOUTHCOM area, this trend is reversed. There, 58 percent (28) of the 45 vessels were state-run, with the remaining 42 percent (19) run by NGOs. This is again mirrored with the 20 vessels that conduct multinational maritime health engagements across multiple countries, with 75 percent (15) of vessels operated by state actors. For a summary of the above, see figure 6.

 

Figure 6. State-run vs nonstate-run hospital ships in different CCMD areas

Source: courtesy of the author.

 

Most Currently Active Hospital Ships in the World Have Been Developed in the Past 25 Years

When considering the 130 of 138 active vessels found for this study whose date of commissioning could be identified, 88 percent (114) had been put into service since the year 2000 (figure 7). Even more stark a number, 32 percent (41) of these vessels were made operational in the past five years. These numbers highlight the relative youth of today’s hospital ship ecosystem.

When exploring trends between state- and nonstate-operated vessels, a similar pattern emerges. At least 84 percent (53) of the 63 state-run vessels found for this study whose date of commissioning could be identified were put into service since 2000. For the remaining 67 NGO-operated vessels whose date of commissioning could be identified, 91 percent (61) were put into service since 2000.

Looking at the different flags of vessels and their associated CCMD areas, further nuances emerge. In AFRICOM, two of the three vessels flagged were put into service after 2020, with a similar picture in EUCOM, where five of the seven vessels flagged were commissioned after 2000. In INDOPACOM, 63 of the 68 vessels flagged began operating since 2000, and 35 percent (24) of these since 2020. In SOUTHCOM, 42 of the 48 vessels flagged were put into service since 2000, with 29 percent (14) of these since 2020. Only vessels flagged to NORTHCOM went counter to this trend, with just one of the four vessels found for this study—Youth with a Mission’s Amazing Grace—beginning operations after 2000.

With the development of at least 14 hospital ships underway by state and nonstate entities—including new actors in the maritime medical sector such as India, which is developing a national hospital ship—the use of these specialized vessels for both domestic-focused social services and soft power aboard looks set to continue for the near term.[29]

 

Figure 7. Cumulative number of hospital ships commissioned since 1970

Source: courtesy of the author.

 

Conclusion

This article has attempted to provide an initial quantitative baseline about the extent of the world’s active hospital ships. It is an ecosystem that is perhaps larger than people realize, with at least 138 active vessels and 14 more ships under development or in a conceptual phase. This ecosystem has developed considerably in the past 25 years, is heavily active in Asia and South America, and is one that is predominantly riverine-based. It is also a system that this largely operated by nonstate actors and predominantly single-context focused, although a small number of actors conduct multinational maritime health engagements.

In peacetime, having a holistic understanding of this ecosystem could help those coordinating health engagement activities, both civilian and military, to prevent duplication of efforts, enhance existing programs, improve collaboration efforts, and reenforce maritime global health engagement. As the era of strategic and regional competition intensifies, analyzing how some actors use multinational maritime health engagement to project maritime soft power could reveal priorities for shaping influence in key regions before open conflict emerges. In warfare, understanding the extent of various state and nonstate maritime medical platforms in the world could help share the burden of medical needs between partners and allies, as well as for civilians that will inevitably be caught up in the fighting.

If a transition to conflict occurs, several hospital ships identified for this study, both military and civilian, would face challenges in complying with the proper identifications and/or protections governing hospital ships in the Second Geneva Convention and other customary international laws. For example, the Royal Navy’s RFA Argus, which is painted gray and not exclusively used for medical purposes, or Mercy Ship’s Global Mercy, which does not have any red cross markings displayed on its hull, may fall into these categories if conflict were to break out.

Taking a wider view, the large ecosystem of hospital ships operating in the world today raises questions about how much consideration is given to the capabilities of these vessels in scenario planning. For example, what efforts are being made to understand how coordination or interaction would work between military and civilian entities for maritime medical activities? How would these vessels be employed effectively to respond to survivors of convoy attacks that could involve large numbers of casualties, similar to what was seen in the Atlantic Ocean during World War II? How well understood are the legal parameters of what makes a hospital ship a protected vessel under the Second Geneva Convention by military and civilian decision makers at all levels and from all sides? Using hospital ships as a lens through which to explore wider questions related to the conduct of future warfare could help identify gaps in the knowledge of those planning for a challenging future and root solutions in a reality that considers any mariner, regardless of if they are military or civilian.

 


Appendix 1

Raw Data

The following table provides details about the vessels that were found for this study using open-source data. It lists information that includes each vessel’s name; its area of operation; its operating entity; its flag; its type; the type of cruise it is capable of; the year it was put into service; its length; its displacement; its speed; its full crew complement; the number of patient beds; its stated capabilities; and two sources of information about the vessel.

The table is organized by alphabetical order of the operating entity of the vessel. Acronyms have been used in the stated capabilities section of the table for the purpose of efficiency. These include the following:

CL       clinical laboratory      

D         dentistry

EY       ophthalmology

G         gynecology

GE       geriatrics

IC        intensive care

P          pharmacy

PE       pediatrics

PH       primary health care

R         radiology

S          surgery

SA       social assistance

VI        optometry

 

Table 3. List of hospital ships categorized after step three of the method

NO. VESSEL NAME HULL NUMBER VESSEL FLAG OPERATING ENTITY OPERATING ENTITY TYPE AREA OF OPERATION COMBATANT COMMAND AREA OF RESPONSIBILITY TYPE OF VESSEL CRUISE TYPE VESSEL COMMISSIONED LENGTH (FEET) DISPLACEMENT (TONS) SPEED (KNOTS) RANGE (NAUTICAL MILES) NUMBER OF CREW PATIENT BEDS STATED CAPBILITIES
1 Orinoco Delta Type II N/A Venezuala Amacuro Delta State Ministry Of Health State Venezuela SOUTHCOM Specialist River Clinic Riverine 2022 N/A N/A N/A N/A N/A N/A PH
2 Chosen Vessel II N/A Peru Amazon Medical Ministries Nonstate Peru SOUTHCOM Floating Hospital Riverine 2012 N/A N/A N/A N/A N/A N/A PH
3 Almte. Xavier Pinto Telleria BH-01 Bolivia Bolivian Navy State Bolivia SOUTHCOM Hospital Ship Riverine < 2010 N/A N/A N/A N/A 72 N/A D, EY, G, PE, PH
4 Julian Apaza BH-001 Bolivia Bolivian Navy State Bolivia SOUTHCOM Hospital Ship Lake 1972 N/A N/A N/A N/A N/A N/A CL, D, P, PH, R, S
5 Carlos Chagas U-19 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine 1984 155 490 12 3,000 27 6 CL, D, P, PH, R, S
6 Doutor Montenegro U-16 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine 2000 138 347 10 3,200 60 6 CL, D, IC, P, PH, R, S
7 Oswaldo Cruz U-18 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine 1984 155 490 12 3,000 27 6 CL, D, P, PH, R, S
8 Soares De Meirelles U-21 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine 2010 207 1,338 12 6,000 47 6 CL, D, IC, P, PH, R, S
9 Tenente Maximiano U-28 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine 2009 102 160 12 1,100 23 3 CL, D, IC, P, PH, R, S
10 Shwe Pu Zun N/A Burma Burmese Navy State Burma INDOPACOM River Hospital Ship Riverine 2012 N/A N/A N/A N/A N/A N/A D, IC, PH, R, S
11 Thanlwin AH-02 Burma Burmese Navy State Burma INDOPACOM Hospital Ship Ocean/Sea 2015 N/A N/A N/A N/A N/A N/A D, IC, PH, R, S
12 Saku N/A Burma Burmese Navy State Burma INDOPACOM River Hospital Ship Riverine 2012 N/A N/A N/A N/A N/A N/A D, IC, PH, R, S
13 S.B. Swaminathan N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2008 N/A N/A N/A N/A N/A N/A CL, P, PH
14 N.B. Nahor N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine N/A N/A N/A N/A N/A N/A N/A CL, P, PH
15 Dibrugarh N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2008 N/A N/A N/A N/A  12-15 N/A CL, P, PH
16 Akha N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2005 72 N/A N/A N/A 5 N/A P, PH
17 S.B. Pallavi N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2023 N/A N/A N/A N/A N/A N/A CL, P, PH
18 S.B. Rustam N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2008 N/A N/A N/A N/A N/A N/A CL, P, PH
19 S.B. Namali N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2011 N/A N/A N/A N/A N/A N/A CL, P, PH
20 Jorhat N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2009 N/A N/A N/A N/A N/A N/A CL, P, PH
21 Barpeta Unit 2 N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2009 N/A N/A N/A N/A N/A N/A CL, P, PH
22 Morigaon N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2008 N/A N/A N/A N/A N/A N/A CL, P, PH
23 Kamrup N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2010 N/A N/A N/A N/A N/A N/A CL, P, PH
24 Nalbari N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2009 N/A N/A N/A N/A N/A N/A CL, P, PH
25 Dhubri N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2009 N/A N/A N/A N/A N/A N/A CL, P, PH
26 Goalpara N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2010 N/A N/A N/A N/A N/A N/A CL, P, PH
27 S.B. Shahnaz N/A India Center for Northeast Studies and Policy (C-NES) Nonstate India INDOPACOM Boat Clinic Riverine 2006 N/A N/A N/A N/A N/A N/A CL, P, PH
28 CBM Amazonia N/A Brazil Central Brazil Mission Nonstate Brazil SOUTHCOM Medical Boat Riverine 2012 N/A N/A N/A N/A 40 N/A D, P, PH
29 Cirujiano Videla 74 Chile Chilean Navy State Chile SOUTHCOM Dental Medical Patrol Boat (PMD) Ocean/Sea 2006 139 530 16 N/A N/A N/A D, PH
30 Nusa Waluya I N/A Indonesia DoctorShare NGO Nonstate Indonesia INDOPACOM Floating Hospital Ocean/Sea 2015 N/A N/A N/A N/A 28 N/A D, PH, S
31 Nusa Waluya II N/A Indonesia DoctorShare NGO Nonstate Indonesia INDOPACOM Floating Hospital Barge Ocean/Sea 2023 148 N/A N/A N/A 35 N/A CL, D, P, PH, R, S
32 Dr Lie Dharmawan II N/A Indonesia DoctorShare NGO Nonstate Indonesia INDOPACOM Floating Hospital Ocean/Sea 2022 N/A N/A N/A N/A N/A N/A PH
33 Elpis TP-943D Italy Elpis Hospital Ship Association Nonstate Gambia, Italy, Madagascar Global Hospital Ship Ocean/Sea 2016 N/A N/A N/A N/A 6 N/A CL, D, PH, R, S
34 Friendship Hospital N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2008 N/A N/A N/A N/A N/A 16 CL, D, PH, R, S
35 King Abdullah Friendship Hospital 1 N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2020 101 N/A N/A N/A 30 16 CL, D, PH, R, S
36 King Abdullah Friendship Hospital 2 N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2020 82 N/A N/A N/A 30 16 CL, D, PH, R, S
37 King Abdullah Friendship Hospital 3 N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2025 N/A N/A N/A N/A N/A N/A CL, D, PH, R, S
38 King Abdullah Friendship Hospital 4 N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2025 N/A N/A N/A N/A N/A N/A CL, D, PH, R, S
39 King Abdullah Friendship Hospital 5 N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2025 N/A N/A N/A N/A N/A N/A CL, D, PH, R, S
40 Lifebuoy Friendship Hospital M-7170 Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 2001 125 N/A N/A N/A N/A N/A  P, PH
41 RV Innwa N/A Burma FXB Myanmar Nonstate Burma INDOPACOM Floating Clinic Riverine 2021 N/A N/A N/A N/A N/A N/A D, EY,G, PH, R, VI
42 RV Min Gun N/A Burma FXB Myanmar Nonstate Burma INDOPACOM Floating Clinic Riverine 2021 N/A N/A N/A N/A N/A N/A D, EY,G, PH, R, VI
43 Ha Esperanca N/A Brazil Hope for Brazil Nonstate Brazil SOUTHCOM Medical Boat Riverine 2016 N/A N/A N/A N/A N/A N/A PH
44 Jibon Tari 0-9765 Bangladesh Impact Foundation  Nonstate Bangladesh INDOPACOM Floating Hospital Riverine 1999 N/A N/A N/A N/A N/A N/A CL, EY, PH, S, VI
45 Geongang Ongjin Ho N/A Republic of Korea Incheon City Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 2025 155 270 25 N/A 44 N/A D, P, PH, R
46 Dr Soeharso 990 Indonesia Indonesian Navy State Egypt, Indonesia, Timor Leste Global Hospital Assistance Ship Ocean/Sea 2008 400 11,500 15 8,600 177 40 CL, D, IC, P, PH, R, S
47 Dr Wahidin Sudirohusodo 991 Indonesia Indonesian Navy State Egypt, Fiji, Indonesia, Papua New Guinea, Solomon Islands, Vanuatu Global Hospital Assistance Ship Ocean/Sea 2022 407 7,290 18 10,000 186 159 CL, D, IC, P, PH, R, S
48 Dr Radjiman Wedyodiningrat 992 Indonesia Indonesian Navy State Egypt, Indonesia   Global Hospital Assistance Ship Ocean/Sea 2023 407 7,290 18 10,000 186 159 CL, D, IC, P, PH, R, S
49 Semarang 594 Indonesia Indonesian Navy State Indonesia, Singapore Global Hospital Assistance Ship Ocean/Sea 2019 404 11,583 16 9,360 121 N/A CL, D, IC,P, PH, R, S
50 Esperanza Del Mar N/A Spain Instituto Social De la Marina State Spain, Atlantic Ocean around Canary Islands and Saharan/Mauritanian fishing grounds Global Hospital Ship Ocean/Sea 2001 319 4,996 17 7,000 38 17 CL, IC, P, PH, R, S
51 Juan De La Cosa N/A Spain Instituto Social De la Marina State Spain, North Atlantic Ocean, Bay of Biscay and Azores Global Hospital Ship Ocean/Sea 2006 246 2,649 11 N/A 28 22 CL, IC, PH, R, S
52 Polli 8858 Burma Irrawaddy River Doctors Nonstate Burma INDOPACOM Floating General Practice Vessel Riverine 2014 N/A N/A N/A N/A 15 N/A CL, D, G, PE, PH
53 Swimming Doctors 3 N/A Burma Irrawaddy River Doctors Nonstate Burma INDOPACOM Floating General Practice Vessel Riverine 2016 N/A N/A N/A N/A 15 N/A CL, D, G, PE, PH
54 San Raffaele MC-010552 Colombia Italo-Colombian Foundation Of Mount Tabor Nonstate Colombia SOUTHCOM Hospital Ship Ocean/Sea 2009 75 N/A 9 N/A 7 N/A CL, EY, G, P, PE, PH, S, VI
55 Vivekanda Boat Clinic N/A India Karuna Trust Nonstate India INDOPACOM Boat Clinic Riverine N/A N/A N/A N/A N/A N/A N/A P, PH
56 Floating Clinic Boat N/A Nigeria Lagos State Ministry of Health State Nigeria AFRICOM Floating Clinic Boat Riverine 2022 60 N/A N/A N/A 4 N/A PH
57 Pacific Hope IMO-8221686 Cook Islands Marine Reach Global Nonstate Brazil, Bahamas, Colombia, Dominica, Dominican Republic, Fiji, Mexico, New Zealand, Vanuatu Global Humanitarian Medical Relief Vessel Ocean/Sea 2013 168 480 14 20,000 60 N/A EY, D, PH, VI
58 Mau Pata N/A Colombia Medical Ministry International Nonstate Brazil, Colombia, Peru Global Hospital Boat Riverine 2023 N/A N/A N/A N/A 10 10 CL, D, EY, P, PH, S, R, VI
59 Africa Mercy N/A Malta Mercy Ships Nonstate Benin, Cameroon, Liberia, Madagascar, Republic of Congo, Republic of Guinea, Senegal, South Africa, Togo Global Hospital Ship Ocean/Sea 2007 499 16,500 19 N/A 484 94 CL, D, EY, G, GE, IC, P, PE, PHR, S, VI
60 Global Mercy N/A Malta Mercy Ships Nonstate Senegal, Sierra Leone Global Hospital Ship Ocean/Sea 2023 571 37,000 12 N/A 600 199 CL, D, EY, G, GE, IC, P, PE, PHR, S, VI
61 El Evangelista N/A Peru Mision a Bordo Nonstate Peru SOUTHCOM Medical Boat Riverine 2005 98 N/A N/A N/A 53 N/A PH
62 Ixdos N/A NA Mission Ship Nonstate Thailand, Indian Ocean INDOPACOM Medical Ship Ocean/Sea 2019 60 N/A N/A N/A 12 N/A PH
63 Papa Francisco N/A Brazil Order of Friars Minor (OFM) Fraternitas Foundation Nonstate Brazil SOUTHCOM Hospital Ship Riverine 2019 105 N/A 7 N/A 40 30 CL, D, P, PH, R, S
64 Sao Joao XXIII N/A Brazil Order of Friars Minor (OFM) Fraternitas Foundation Nonstate Brazil SOUTHCOM Hospital Ship Riverine 2024 157 N/A N/A N/A 60 N/A CL, D, P, PH, R, S
65 Sao Joao Paulo II N/A Brazil Order of Friars Minor (OFM) Fraternitas Foundation Nonstate Brazil SOUTHCOM Hospital Ship Riverine 2021 N/A N/A N/A N/A N/A N/A D, PH, R, S
66 Kensing N/A Palau Peace Winds Japan Nonstate Palau INDOPACOM Health Screening Ship Ocean/Sea 2021 112 N/A N/A N/A 20 N/A CL, PH
67 Kensing II N/A Palau Peace Winds Japan Nonstate Palau INDOPACOM Health Screening Ship Ocean/Sea 2024 131 N/A N/A N/A N/A N/A CL, PH
68 Yanyu 861 People's Republic of China People's Armed Forces Maritime Militia (PAFMM) (Likely) State People's Republic of China INDOPACOM Hospital Ship Ocean/Sea N/A N/A N/A N/A N/A N/A N/A NA
69 Auspicious Ark 868 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Hospital Ship Ocean/Sea 2025 591 25,750 19 10,000 130 300 CL, D, EY, IC, P, PH, R, S, VI
70 Bei Yi 1 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Ambulatory Transport Craft Ocean/Sea 2015-2018 200 N/A N/A N/A N/A N/A NA
71 Dong Yi 12 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Ambulatory Transport Craft Ocean/Sea 2015-2018 200 N/A N/A N/A N/A N/A NA
72 Dong Yi 13 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Ambulatory Transport Craft Ocean/Sea 2015-2018 200 N/A N/A N/A N/A N/A NA
73 Nan Yi 10 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Ambulatory Transport Craft Ocean/Sea 2015-2018 200 N/A N/A N/A N/A N/A NA
74 Nan Yi 11 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Ambulatory Transport Craft Ocean/Sea 2015-2018 200 N/A N/A N/A N/A N/A NA
75 Peace Ark 866 People's Republic of China People's Liberation Army Navy State Global Global Hospital Ship Ocean/Sea 2008 591 25,750 19 10,000 130 300 CL, D, EY, IC, P, PH, R, S, VI
76 Shichang  82 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Containerized Hospital Ship Ocean/Sea 1997 394 11,200 18 8,000 370 N/A NA
77 Silk Road Ark 867 People's Republic of China People's Liberation Army Navy State People's Republic of China, South China Sea Global Hospital Ship Ocean/Sea 2023 591 25,750 19 10,000 130 300 CL, D, EY, IC, P, PH, R, S, VI
78 Youai 861 People's Republic of China People's Liberation Army Navy State People's Republic of China, South China Sea Global Hospital Ship Ocean/Sea 2020 361 4,000+ N/A 4,000+ N/A 100 CL, D, EY, IC, P, PH, R, S, VI
79 Youhao 862 People's Republic of China People's Liberation Army Navy State People's Republic of China, South China Sea Global Hospital Ship Ocean/Sea 2020 361 4,000+ N/A 4,000+ N/A 100 CL, D, EY, IC, P, PH, R, S, VI
80 Zhuang He 865 People's Republic of China People's Liberation Army Navy State People's Republic of China INDOPACOM Medical Evacuation Ship Ocean/Sea 2004 200 30,000 17 18,000 N/A N/A CL, D, EY, IC, P, PH, R, S, VI
81 Puno 306 Peru Peruvian Coastguard State Peru SOUTHCOM Hospital Ship Lake 1872 100 140 10 N/A N/A N/A PH
82 Corrientes 303 Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2017 N/A N/A N/A N/A N/A N/A CL, D, PH
83 Curaray 304 Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 1970 138 250 N/A N/A 21 N/A CL, D, PH
84 Lake Titicaca I N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Lake 2017 N/A N/A N/A N/A N/A N/A CL, D, PH
85 Pastaza 305 Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2017 N/A N/A N/A N/A N/A N/A CL, D, PH
86 Raumis N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2021 138 250 N/A N/A  21 N/A CL, D, PH
87 Rio Morona N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2015 138 250 N/A N/A  21 N/A CL, D, PH
88 Rio Napo N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2013 N/A N/A N/A N/A N/A N/A CL, D, PH
89 Rio Putumayo I N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2015 138 250 N/A N/A  21 N/A CL, D, PH
90 Rio Putumayo II N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2016 138 250 N/A N/A  21 N/A CL, D, PH
91 Rio Ucayali I N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2024 157 N/A 9 N/A 43 N/A CL, D, PH
92 Rio Ucayali II N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2024 157 N/A 9 N/A 43 N/A CL, D, PH
93 Rio Yavari N/A Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2024 138 250 N/A N/A 21 N/A CL, D, PH
94 Yahuas 302 Peru Peruvian Navy State Peru SOUTHCOM Itinerant Social Action Platform (PIAS) Riverine 2015 N/A N/A N/A N/A N/A N/A CL, D, PH
95 Amelia Gordon N/A Philippines Philippines Coast Guard State Philippines INDOPACOM Hospital Ship Ocean/Sea 2017 195 N/A N/A N/A 129 N/A NA
96 Ang Pangulo N/A Philippines Philippines Navy State Philippines INDOPACOM Hospital Ship Ocean/Sea 2022 253 2,200 18 6,000 81 28 PH
97 Esperanza N/A Peru Project Amazonas Nonstate Peru SOUTHCOM Medical Expedition Boat Riverine 2010 75 N/A N/A N/A 18 N/A PH
98 Walter Bartolo N/A Brazil Rondonia State Government State Brazil SOUTHCOM River Social Health Unit (USSF) Riverine 2016 77 134 N/A N/A N/A N/A CL, D, PH, R, S, SA
99 Argus A135 United Kingdom Royal Navy's Royal Fleet Auxillary State UK, Carribean, Medeterrainian, Middle East, West Africa, Global Primary Casualty Receiving Ship Ocean/Sea 1984 575 28,080 18 20,000 120 100 CL, IC, PH, R, S
100 Irtysh N/A Russian Federation Russian Navy State Russia (Pacific Coast) INDOPACOM Hospital Ship Ocean/Sea 1990 478 11,300 20 11,600 207 N/A CL, D, EY, P, PH, R, S, VI
101 Ruth Bell N/A Bolivia Samaritan's Purse Nonstate Bolivia SOUTHCOM Medical Boat Riverine 2011 N/A N/A N/A N/A N/A N/A PH
102 Abare II N/A Brazil Santarem City Government State Brazil SOUTHCOM Basic River Health Unit (UBSF) Riverine 2022 79 N/A N/A N/A N/A N/A CL, D, EY, P, PH, VI
103 Ailton Barros N/A Brazil Santarem City Government State Brazil SOUTHCOM Basic River Health Unit (UBSF) Riverine 2022 N/A N/A N/A N/A N/A N/A CL, D, EY, G, GE, P, PE, PH, VI
104 Igaracu N/A Brazil Santarem City Government State Brazil SOUTHCOM Basic River Health Unit (UBSF) Riverine 2019 79 N/A N/A N/A 24 N/A CL, D, P, PH  
105 Manoel Andrade N/A Brazil Santarem City Government State Brazil SOUTHCOM Basic River Health Unit (UBSF) Riverine 2020 N/A N/A N/A N/A 24 N/A CL, D, P, PH  
106 Sunbeam N/A United States Sea Coast Mission Nonstate USA NORTHCOM Island Health Ship Ocean/Sea 1995 74 N/A 10 N/A N/A N/A PH
107 Smile on Boat N/A India Smile Foundation India Nonstate India INDOPACOM Boat Clinic Riverine 2025 N/A N/A N/A N/A 5 N/A PH
108 Luz Na Amazonia III  N/A Brazil Sociedade Biblica Do Brazil Nonstate Brazil SOUTHCOM Hospital Boat Riverine 1997 N/A N/A N/A N/A N/A N/A PH, SA
109 Chungnam 501 Republic of Korea South Chungcheong Provincial Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 2024 164 320 20 1,037 50 N/A D, P, PH, R
110 Gyeongnam 511 Republic of Korea South Gyeongsang Provincial Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 2004 122 162 N/A N/A 17 N/A D, P, PH, R
111 Jeonnam 511 Republic of Korea South Jeolla Provincial Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 2023 161 390 18 N/A 17 N/A D, P, PH, R
112 Jeonnam 512 Republic of Korea South Jeolla Provincial Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 2003 161 170 N/A N/A 17 N/A D, P, PH, R
113 M.V. Dominique N/A India Southern Health Improvement Samity (SHIS) Foundation Nonstate India INDOPACOM Mobile Medical Unit Riverine 1997 N/A N/A N/A N/A N/A N/A P, PH
114 M.V. Dayanidhi N/A India Southern Health Improvement Samity (SHIS) Foundation Nonstate India INDOPACOM Boat Clinic Riverine N/A N/A N/A N/A N/A N/A N/A P, PH
115 M.V. Shis N/A India Southern Health Improvement Samity (SHIS) Foundation Nonstate India INDOPACOM Boat Clinic Riverine N/A N/A N/A N/A N/A N/A N/A P, PH
116 M.V. Shis Sundarbans N/A India Southern Health Improvement Samity (SHIS) Foundation Nonstate India INDOPACOM Boat Clinic Riverine N/A N/A N/A N/A N/A N/A N/A P, PH
117 Hospital Fluvial N/A Brazil St Francis Leprosy Guild Nonstate Brazil SOUTHCOM River Hospital Riverine 2022 N/A N/A N/A N/A N/A N/A PH
118 SSF Ania N/A St Kitts and Nevis UAE Ministry of Health State Egypt, United Arab Emirates Global Floating Hospital Ocean/Sea 2024 653 23,503 13 N/A 100 100 CL, IC, P, PH, R, S
119 Manfred Grellert N/A Brazil United Methodist Church Nonstate Brazil SOUTHCOM Medical Boat Riverine 2009 N/A N/A N/A N/A N/A N/A D, PH  
120 USNS Comfort N/A United States United States Navy State Global Global Hospital Ship Ocean/Sea 1987 894 69,360 17 13,400 1,300 1,000 CL, D, EY, IC, P, PH, R, S, VI
121 USNS Mercy N/A United States United States Navy State Global Global Hospital Ship Ocean/Sea 1987 894 69,360 17 13,400 1,300 1,000 CL, D, EY, IC, P, PH, R, S, VI
122 Abare I   N/A Brazil University of Western Para State Nonstate Brazil SOUTHCOM Basic River Health Unit (UBSF) Riverine 2006 N/A N/A N/A N/A N/A N/A CL, D, P, PH, R, S
123 Khanh Hoa 561 Vietnam Vietnam People's Navy State Vietnam, Indonesia and Truong Sa (Spratly) archipelago Global Mobile Sea Hospital Ocean/Sea 2012 148 2,070 18 N/A 200 15 CL, D, P, PH, R, S
124 Amazon Hope II 210-50242 Peru Vine Trust Nonstate Peru SOUTHCOM Medical Ship Riverine 2018 174 N/A N/A N/A 30 N/A D, EY, P, PH, VI
125 Forth Hope N/A Peru Vine Trust Nonstate Peru SOUTHCOM Medical Ship Riverine 2017 115 320 N/A N/A 28 N/A CL, D, EY, P, PH, VI
126 Jubilee Hope N/A Tanzania Vine Trust Nonstate Tanzania AFRICOM Medical Ship Lake 2015 79 160 11 N/A 7 N/A CL, D, EY, PH, S, VI
127 Lady Jean N/A Tanzania Vine Trust Nonstate Tanzania AFRICOM Medical Ship Lake 2023 52 N/A N/A N/A N/A N/A PH
128 Solidarity N/A Brazil World Vision International Nonstate Brazil SOUTHCOM Hospital Ship Riverine 2020 N/A N/A N/A N/A N/A N/A D, PH
129 Laksamana Malahayati N/A Indonesia Yayasan Mega Gotong Royong Nonstate Indonesia INDOPACOM Floating Hospital Ocean/Sea 2023 82 N/A N/A N/A 21 N/A CL, EY, PH, R, S, VI
130 Sao Mateus Singapore II N/A Brazil Youth with a Mission (YWAM) Nonstate Brazil SOUTHCOM Medical Ship Riverine N/A N/A N/A N/A N/A N/A N/A PH
131 Australia II N/A Brazil Youth with a Mission (YWAM) Nonstate Brazil SOUTHCOM Medical Ship Riverine N/A N/A N/A N/A N/A N/A N/A PH
132 YWAM Liberty N/A Cook Islands Youth with a Mission (YWAM) Nonstate Cook Islands, Papau New Guinea INDOPACOM Medical Ship Ocean/Sea 2018 214 1,753 14 N/A 50 N/A D, EY, P, PH, VI
133 YWAM Cloud Nine N/A Marshall Islands Youth with a Mission (YWAM) Nonstate Marshall Islands INDOPACOM Medical Ship Ocean/Sea 1999 57 N/A N/A N/A N/A N/A PH
134 Amazing Grace N/A Mexico Youth with a Mission (YWAM) Nonstate Mexico NORTHCOM Medical Ship Ocean/Sea 2017 101 170 N/A N/A 27 N/A D, EY, P, PH, VI
135 YWAM Koha N/A New Zealand Youth with a Mission (YWAM) Nonstate New Zealand INDOPACOM Medical Ship Ocean/Sea 2019 160 486 14 9,000 12 N/A D, EY, P, PH, VI
136 YWAM PNG N/A Papua New Guinea Youth with a Mission (YWAM) Nonstate Papua New Guinea INDOPACOM Medical Ship Ocean/Sea 2014 197 1,520 N/A N/A 130 N/A CL, D, EY, P, PH, VI
137 Pacific Link N/A Philippines Youth with a Mission (YWAM) Nonstate Philippines INDOPACOM Medical Ship Ocean/Sea 2010 131 282 N/A N/A N/A N/A PH
138 Island Reach N/A United Kingdom Youth with a Mission (YWAM) Nonstate Madagascar AFRICOM Medical Ship Ocean/Sea 1984 79 N/A 10 1,200 12 6 D, P, PH
139 Unnamed Vessel N/A People's Republic of China Beijing Pinglan Public Welfare Foundation Nonstate N/A INDOPACOM Medical Rescue Ship Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
140 Anna Nery U-170 Brazil Brazilian Navy State Brazil SOUTHCOM Infirmary Assistance Ship (NASH) Riverine Under Development 153 N/A N/A N/A N/A N/A NA
141 Unnamed Vessel N/A India Indian Navy State N/A INDOPACOM National Hospital Ship Ocean/Sea Under Development 175 15,000 N/A N/A 350 117 NA
142 Unnamed Vessel N/A Japan Japan Maritime Self Defense Forces State N/A INDOPACOM Converted RoRo Hospital Ship Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
143 Lake Tanganyika Floating Health Clinic N/A NA Lake Tanganyika Floating Health Clinic Nonstate Burundi, the Democratic Republic of Congo, Tanzania, and Zambia AFRICOM Floating Hospital Lake Under Development N/A N/A N/A N/A N/A N/A NA
144 Atlantic Mercy N/A NA Mercy Ships Nonstate N/A N/A Hospital Ship Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
145 Bethesda N/A USA United States Navy State N/A N/A Expeditionary Medical Ship (EMS) Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
146 Balboa N/A USA United States Navy State N/A N/A Expeditionary Medical Ship (EMS) Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
147 Portsmouth N/A USA United States Navy State N/A N/A Expeditionary Medical Ship (EMS) Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
148 Unnamed Vessel N/A NA Worldwide Hospitals Nonstate N/A N/A Modular Hospital Ship Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
149 Unnamed Vessel N/A NA Worldwide Hospitals Nonstate N/A N/A Modular Hospital Ship Ocean/Sea Under Development N/A N/A N/A N/A N/A N/A NA
150 Aresa 5000B Hospital Ship N/A NA Aresa Shipyard Nonstate N/A EUCOM Hospital Ship Ocean/Sea Concept N/A N/A N/A N/A N/A N/A NA
151 Aresa 3000B Hospital Ship N/A NA Aresa Shipyard Nonstate N/A EUCOM Hospital Ship Ocean/Sea Concept N/A N/A N/A N/A N/A N/A NA
152 Project Varan Hospital Ship N/A Russian Federation The Nevsky Design Bureau State N/A EUCOM Hospital Ship Ocean/Sea Concept N/A N/A N/A N/A N/A N/A NA
153 Francis Anne N/A Brazil Central Brazil Mission Nonstate Brazil SOUTHCOM Medical Boat Riverine 2000 N/A N/A N/A N/A N/A N/A NA
154 Dr Lie Dharmawan N/A Indonesia DoctorShare NGO Nonstate Indonesia INDOPACOM Floating Hospital (RSA) Ocean/Sea 2013 74 N/A N/A N/A 22 10 NA
155 Rongdhonu Friendship Hospital N/A Bangladesh Friendship NGO Nonstate Bangladesh INDOPACOM Hospital Ship Ocean/Sea 2013 181 555 13 N/A N/A N/A PH
156 M.V. Splendid N/A Italy Grandi Navi Veloci (GNV) Nonstate Italy EUCOM Hospital Ship Ocean/Sea 2020 216 39,139 21 N/A N/A N/A 25
157 Gil Eannes N/A Portugal Grémio dos Armadores de Navios da Pesca do Bacalhau State Portugal, Altanic Ocean EUCOM Hospital Ship Ocean/Sea 1955 323 3,467 13 N/A N/A N/A NA
158 Incheon 531 Republic of Korea Incheon City Government State Republic of Korea INDOPACOM Hospital Ship Ocean/Sea 1999 N/A 108 N/A N/A 17 8 NA
159 S.Y. Next Wave N/A United Kingdom Pacific Reach Nonstate Medeterrainian EUCOM Hospital Ship Ocean/Sea 2004 N/A N/A N/A N/A N/A N/A PH
160 M.Y. Pacific Ruby N/A New Zealand Pacific Reach Nonstate Pacific Ocean INDOPACOM Medical Ship Ocean/Sea 2005 N/A 381 N/A N/A N/A N/A PH
161 M.V. Island Mercy N/A Panama Pacific Reach Nonstate Carribean, Central and South America SOUTHCOM Medical Ship Ocean/Sea 1983 173 998 N/A N/A 80 N/A PH
162 Gejeol 505 Republic of Korea Pan Entertainment Production Company Nonstate Republic of Korea INDOPACOM Prop Hospital Ship Set Ocean/Sea N/A N/A N/A N/A N/A N/A N/A NA
163 Nan Kang  833 People's Republic of China People's Liberation Army Navy State People's Republic of China, South China Sea INDOPACOM Ambulatory Transport Craft Ocean/Sea 1991 282 2,409 16 3,000 59 100 NA
164 South Medic  9 People's Republic of China People's Liberation Army Navy State People's Republic of China, South China Sea INDOPACOM Ambulatory Transport Craft Ocean/Sea 1991 282 2,409 16 3,000 59 100 NA
165 M.S. Neptune N/A Egypt Rotary Club Egypt Nonstate Egypt AFRICOM Hospital Ship Riverine 2019 74 N/A N/A N/A N/A 29 NA
166 Ob N/A Russian Federation Russian Navy State Russia (Pacific Coast) INDOPACOM Hospital Ship Ocean/Sea 1980 478 11,300 20 11,600 207 300-450 NA
167 Yenisey N/A Russian Federation Russian Navy State Russia (Black Sea) EUCOM Hospital Ship Ocean/Sea 1981 478 11,300 20 11,600 207 300-450 NA
168 Svir N/A Russian Federation Russian Navy State Russia (North Sea) EUCOM Hospital Ship Ocean/Sea 1981 478 11,300 20 11,600 207 300-450 NA
169 Sunbeam N/A USA Sea Coast Mission Nonstate USA NORTHCOM Island Health Ship Ocean/Sea 1964 65 N/A N/A N/A N/A N/A NA
170 Luz Na Amazonia N/A Brazil Sociedade Biblica Do Brazil Nonstate Brazil SOUTHCOM Hospital Boat Riverine 1962 N/A N/A N/A N/A N/A N/A NA
171 Luz Na Amazonia II N/A Brazil Sociedade Biblica Do Brazil Nonstate Brazil SOUTHCOM Hospital Boat Riverine 1990 N/A N/A N/A N/A N/A N/A NA
172 Carribbean Mercy N/A Panama Mercy Ships Nonstate 18 countries within Caribbean and Central America: Dominican Republic, Haiti, Nicaragua, Guatemala, El Salvador, Russia, Korea, China, Philippines, Colombia, Puerto Rico, Honduras, and Belize Global Hospital Ship Ocean/Sea 1994 262 2,125 N/A N/A 87 N/A CL, D, EY, P, PH, R, S, VI
173 Anastasis N/A Malta Mercy Ships Nonstate 275 ports in 23 nations around the world in Central and South America, the Caribbean, the Baltic coast, and Sub-Saharan Africa Global Hospital Ship Ocean/Sea 1978 522 11,701 N/A N/A 420 N/A CL, D, EY, P, PH, R, S, VI

Source: courtesy of the author.

 

Endnotes


[1] Guo Yuandan, Liang Rui, and Liu Xuanzun, “PLA Navy Unveils Third 10,000-ton-class Hospital Ship,” Global Times, 19 May 2025.

[2] Wang Zhenjiang, Dai Zongfeng, and Cui Xinwen, “ ‘Peace Ark’ Hospital Ship to Visit Latin America,” Liberation Army Daily, 16 September 2011; and Zheng Caixong, “Navy’s Hospital Ship Heads out for Rescue Drills, Medical Aid in South China Sea,” China Daily, 11 July 2024.

[3] For more information on the PLAN’s hospital ship ecosystem compared to that of the U.S. Navy, see Jonathan Robinson, China Maritime Report No. 45: The PLA Navy’s Hospital Ship Fleet: Concerns, Developments, and Future Prospects, CMSI China Maritime Report no. 45 (Newport, RI: U.S. Naval War College, 2025).

[4] For example, see Eileen Natuzzi, “Military Hospital Ships from China and the U.S. Are Plying across Pacific Islands: But This Growing Competition Can Do More Harm than Good,” Interpreter, 10 July 2023; and Leah Averitt, “China’s Growing Maritime HA/DR Capabilities,” Jamestown Foundation China Brief 10, no. 12 (11 July 2010): 5–7.

[5] “Hospital Ship,” International Committee of the Red Cross, accessed 27 February 2026. In the Second Geneva Convention of 1949, a hospital ship, medical ship, and medical transport were defined as “a ship built, converted, or equipped specially or solely with a view to assisting, treating, and transporting the wounded, sick, and shipwrecked. In case of international armed conflict, its name and description must be notified to the parties to the conflict ten days before it is employed. It may not be attacked or captured and must be respected and protected. The religious and medical personnel and crew of hospital ships have a right to the same protection. The distinctive sign for the protection of hospital ships is the emblem of the red cross, red crescent, or red crystal on a white ground. The lifeboats and coastal lifeboats of hospital ships are treated in the same way as hospital ships. So, as far as possible, are the sick bays of a warship. Hospital ships are bound to afford relief and assistance to the wounded, sick and shipwrecked without distinction of nationality. The parties to the conflict have the right to stop and visit hospital ships in accordance with precise regulations. Any warship belonging to a belligerent may demand, on certain conditions, that sick, wounded, or shipwrecked persons on board a hospital ship shall be handed over.” For further information on how the protected status of a hospital ship can be lost, see Articles 34 and 35 of the Convention for the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea (12 August 1949); Article 23 (3) of the Protocol Additional to the Geneva Conventions of 12 August 1949, and Relating to the Protection of Victims of International Armed Conflicts (Protocol I) (8 June 1977); and paragraphs 48–51 and 137 of the San Reno Manual on International Law Applicable to Armed Conflicts at Sea (12 June 1994), hereafter San Reno Manual.

[6] Convention (III) for the Adaptation to Maritime Warfare of the Principles of the Geneva Convention of 22 August 1864 (29 July 1899); Convention for the Exemption of Hospital Ships, in Time of War, from the Payment of All Dues and Taxes Imposed for the Benefit of the State (21 December 1904); and Convention (X) for the Adaptation to Maritime Warfare of the Principles of the Geneva Convention (18 October 1907).

[7] Convention (II) for the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea (12 August 1949); Protocol Additional to the Geneva Conventions of 12 August 1949 and relating to the Protection of Victims of International Armed Conflicts (Protocol I) (8 June 1977); Protocol Additional to the Geneva Conventions of 12 August 1949 and relating to the Protection of Victims of Non-International Armed Conflicts (Protocol II) (8 June 1977); and San Remo Manual.

[8] Barrett Tillman, “Mercy Afloat,” Naval History 34, no. 4 (August 2020).

[9] For more on the Royal Navy’s development of hospital ships, see Sougat Ray, “Navy Hospital Ships in History,” Journal of Marine Medical Society 19, no. 1 (January–June 2017): 63–65, https://doi.org/10.4103/jmms.jmms_43_17. For more on the USS Red Rover, see Sebastian Kevany et al., “In Support of Hospital Ships: A Need for Reform, Not Rejection,” Daniel K. Inouye Asia-Pacific Center for Security Studies Security Nexus 23 (March 2022): 1–9.

[10] “United States Naval Hospital Ships,” Naval History and Heritage Command, 23 August 2017.

[11] Robinson, “The PLA Navy’s Hospital Ship Fleet.”

[12] Military Balance 2025 (London: International Institute for Strategic Studies, 2025). The Military Balance is produced by the International Institute for Strategic Studies as an annual authoritative assessment of military capabilities and defense economics worldwide. Detailed alphabetical entries list each country’s military organization, personnel members, equipment inventories, and relevant economic and demographic data. 

[13] For example, the keyword “hospital ship” would be combined with “United States of America” to become “hospital ship United States of America,” which would be inputted in the search bar in Google.

[14] The vessels found were named or described by the following terms: ambulatory transport craft; basic river health unit; boat clinic; clinic ship; containerized hospital ship; converted roll off-roll on cargo hospital ship; dental medical patrol boat; expeditionary medical ship; floating clinic; floating clinic boat; floating general practice vessel; floating hospital; floating hospital barge; health screening ship; hospital assistance ship; hospital boat; hospital ship; humanitarian medical relief vessel; infirmary assistance ship; island health ship; itinerant social action platform; medical boat; medical evacuation ship; medical expedition boat; medical rescue ship; medical ship; mobile medical unit; mobile sea hospital; modular hospital ship; national hospital ship; primary casualty receiving ship; river hospital; river hospital ship; river social health unit; and specialist river clinic.

[15] However, if the ship had a dual role but its primary role was defined as being medical, it was included in the study. An example of this is the Royal Navy’s Royal Fleet Auxiliary (RFA) Argus, which is designated as a primary casualty receiving ship but also has a dual role for other military uses. For more, see “Organisation: Units and Squadrons: RFA Argus (A135),” Royal Navy, accessed 18 April 2025.

[16] For more on Dixmude, see “French Warship Treats around 1,000 Injured Gazans off Egyptian Shore,” Times of Israel, 22 January 2024. For more on Vulcano, see “Defense Ministry–Crosetto: Vulcano Navy Ship Is Coming Back with Palestinian Children Onboard,” Italian Ministry of Defense, 31 January 2024.

[17] For more on Anna Nery, see “NAsH ‘Anna Nery’,” Brazilian Navy, accessed 27 February 2026.

[18] For more on these vessels, see Edward Lundquist, “World Navy Report: Peru,” Marine Link, 23 April 2019.

[19] This is in addition to at least three other hospital ships that were built or are in development in PRC shipyards for foreign clients, including two for the German NGO Worldwide Hospitals and one for the U.S. NGO Mercy Ships.

[20] Gusty Da Costa, “Indonesian Navy’s Goodwill Mission Strengthens Ties with South Pacific Nations,” Indo-Pacific Defense Forum, 14 November 2024.

[21] Robinson, “The PLA Navy’s Hospital Ship Fleet.”

[22] It is acknowledged that international law, courts, and conventions have not recognized the PRC’s claims to islands in the South China Sea, many of which are within other countries’ exclusive economic zones. Because of this, PLAN hospital ship activities in this area have been classified for this study as international health engagements rather than domestic health engagements.

[23] “UAE Floating Hospital Sets Sail to Treat Gaza Patients,” National, 8 February 2024.

[24] “RFA Argus (A135).” 

[25] “USNS Comfort,” U.S. Navy Military Sealift Command, accessed 15 August 2025; and “USNS Mercy,” U.S. Navy Military Sealift Command, accessed 15 August 2025.

[26] “Continuing Promise 2025: Hospital Ship Mission to Central America, South America and the Caribbean,” U.S. Southern Command, accessed 15 August 2025; and “Pacific Partnership,” Commander Logistics Group Western Pacific, accessed 15 August 2025.

[27] Similar to the PRC, international law, courts, and conventions have not recognized Vietnam’s claims to islands in the South China Sea. Because of this, Khanh Hoa’s activities in this area have been classified for this study as international health engagements rather than domestic health engagements. For more on the vessel’s visits to the Spratly Islands, see Thong Hai, “A Mobile Hospital at Sea,” Vietnam Pictorial, 25 March 2020.

[28] “Vietnam’s Ship Leaves for Naval Exercise in Indonesia,” VietnamNet Global, 4 April 2016.

[29] “Defence Ministry Plans to Procure National Hospital Ship for Indian Navy,” Defence Watch, 23 May 2022.

About the Author

Jonathan Robinson is an assistant professor at the U.S. Naval War College. A specialist in civilian-military operations, conflict analysis, and human security, he has provided operational advice and in-depth analysis to numerous U.S. and international organizations for more than 15 years, including spending nearly a decade in conflict and post-conflict settings in the Middle East. Since 2019, his research interests have focused on systems for civil-military cooperation, maritime medical capabilities, and the actions of assertive states in the humanitarian space.

https://orcid.org/0009-0001-7880-0732.

The views expressed in this article are solely those of the author. They do not necessarily reflect the opinions of Marine Corps University, the U.S. Marine Corps, the Department of the Navy, or the U.S. government.