With more than 700 medical personnel, 5,000 units of blood and 12 operating rooms, the USNS Comfort is the world's biggest hospital ship.
As part of mission Continuing Promise it is providing assistance to countries across Central and South America, and the Caribbean.
Jamaican Marlene Maxwell went aboard the Comfort to have an overactive thyroid removed, after waiting three years for surgery in her home country.
A radiology suite is just one part of the ship's high tech facilities.
As well as providing humanitarian assistance, crew also offer veterinary and engineering support to partner nations.
Originally an oil tanker, the floating hospital is as high as a 10-story building and the length of three football fields.
This massive undertaking is funded by the U.S government at a projected cost of $40 million dollars. NGOs also donate money and supplies.
An anesthetist and a peri-operative nurse prepare a Guatemalan child for surgery on board the ship.
With 1,000 mouths to feed three times a day, chefs are kept extremely busy.
The floating hospital is equipped with an MH-60S Sea Hawk helicopter, pictured taking off from the flight deck.
In one of the ship's operating rooms an osteopathic surgeon and obstetrics and gynecology surgeon perform a radiology surgery.
Captain Christine Sears is a urologist and the chief medical officer on the Comfort for mission Continuing Promise. She says it's a "blessing to be able to lead and help more people."
Surgical screening packets are organized on board in between ports.
The Comfort carries engineers as well as medical staff. Pictured, an aviation electronics technician conducts maintenance inside the ship's MH-60S Sea Hawk helicopter.