Each vessel is equipped with 10 ton capacity crane and a bollard pull of at least 54 tons. A deck grid is fitted aft which contains 1 inch bolt receptacles spaced 24 inches apart. This allows for the bolting down of a wide variety of portable equipment. There are two GPH fire pumps supplying three fire monitors with up to 2,200 gallons of foam per minute. A deep module can be embarked to support naval salvage teams.
Fleet tugs are used to tow ships, barges and targets for gunnery exercises. They are also used as platforms for salvage and diving work, as participants in naval exercises, to conduct search and rescue missions, to aid in the clean up of oil spills and ocean accidents, and to provide fire fighting assistance. USNS Apache (T-ATF 172) is the last of the Powhatan class of ocean tugs delivered to the Navy in 1981.
Specifications | |
| Builder | Marinette Marine Corporation, Marinette, Wisc |
| Power Plant |
2 GM EMD 20-645F7B diesels; 5.73 MW sustained; 2 shafts; Kort nozzles (except on Powhatan and one other); cp props; bow thruster; 300 hp (224 kW) |
| Length | Overall Length: 226 ft Waterline Length: 204 ft |
| Beam | Extreme Beam: 42 ft Waterline Beam: 42 ft |
| Draft | Maximum Navigational Draft: 15 ft Draft Limit: 15 ft |
| Displacement |
Light Displacement: 1387 tons Full Displacement: 2000 tons Dead Weight: 613 tons |
| Speed | 14.5 knots (16.68 mph) |
| Crew | 16 civilians and 4 naval communications technicians |
| Aircraft | none |
Ships | ||||||
| Name | Number | Builder | Homeport | Ordered | Commissioned | Decommissioned |
| Powhatan | T-ATF 166 | Marinette | Atlantic | 12 Sep 1975 | 15 Jun 1979 | |
| Narragansett | T-ATF 167 | Marinette | Pacific | 12 Sep 1975 | 09 Nov 1979 | |
| Catawba | T-ATF 168 | Marinette | Atlantic | 12 Sep 1975 | 28 May 1980 | |
| Navajo | T-ATF 169 | Marinette | Pacific | 12 Sep 1975 | 13 Jun 1980 | |
| Mohawk | T-ATF 170 | Marinette | Atlantic | 27 Feb 1978 | 16 Oct 1980 | |
| Sioux | T-ATF 171 | Marinette | Pacific | 27 Feb 1978 | 01 May 1981 | |
| Apache | T-ATF 172 | Marinette | Atlantic | 27 Feb 1978 | 23 Jul 1981 | |
