 The US Navy listed its resources in the area as " 17 ships , 48 helicopters and 12 fixed @-@ wing aircraft " in addition to 10 @,@ 000 sailors and Marines . The Navy had conducted <unk> air deliveries , delivered 32 @,@ 400 US gallons ( 123 @,@ 000 L ) of water , <unk> @,@ 440 bottles of water , 111 @,@ <unk> meals and 9 @,@ 000 lb ( 4 @,@ 100 kg ) of medical supplies by 20 January . Hospital ship <unk> began operations on 20 January , completing the arrival of the first group of sea @-@ base vessels ; this came as a new flotilla of USN ships were assigned to Haiti , including survey vessels , ferries , elements of the maritime <unk> and underway <unk> fleets , and a further three amphibious operations ships , including another helicopter carrier , USS Nassau ( <unk> @-@ 4 ) . 
