USNS Comfort(T‑AH‑20)是美国海军仁慈级（Mercy‑class）二号医院船，1987年12月服役，由商船“Rose City”油轮改建，隶属军事海运司令部。该船满载排水量6.9万吨，主尺度约272m×32.2m，航速17.5节。医疗区设12间手术室、1000 张病床（含 80 张 ICU），配直升机起降平台，具备远洋稳定手术能力。平时由63名文职船员维护，战时可在5 天内激活，编入956名海军医疗人员执行任务。主要用于战区医疗支援、灾难救援与人道主义救助，2020 年曾赴纽约参与新冠疫情救治，是全球最知名的海上移动医院之一。

USNS Comfort (T‑AH‑20) is the second Mercy-class hospital ship of the United States Navy. Commissioned in December 1987, it was converted from the commercial oil tanker Rose City and falls under the jurisdiction of the Military Sealift Command.

The vessel has a full load displacement of 69,000 tons, with principal dimensions of approximately 272 meters by 32.2 meters, and a service speed of 17.5 knots. Its medical complex houses 12 operating rooms and 1,000 hospital beds (including 80 ICU beds), fitted with a helicopter landing platform, enabling stable surgical operations during open-ocean voyages.

In peacetime, it is maintained by a crew of 63 civilian mariners. In wartime, it can be fully activated within five days, with 956 Navy medical personnel deployed onboard for missions.

Primarily tasked with theater medical support, disaster relief and humanitarian aid, the ship was dispatched to New York to assist with COVID-19 patient treatment in 2020. It ranks among the world’s most renowned seagoing mobile hospitals.