Suffolk County 1963
York County 1960
Suffolk County 1979
| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
| LST1171 | De Soto County | 788 | Avondale, New Orleans | 15.9.1956 | 28.2.1957 | 10.6.1958 | to Italy 7.1972 (Grado) |
| LST1173 | Suffolk County | Boston N Yd, Charlestown | 15.7.1955 | 5.9.1956 | 15.8.1957 | to MARAD 4.1992 | |
| LST1174 | Grant County | 789 | Avondale, New Orleans | 15.3.1956 | 12.10.1956 | 17.12.1957 | to Brazil 1.1973 (Duque de Caxias) |
| LST1175 | York County | 516 | Newport News | 4.6.1956 | 5.3.1957 | 8.11.1957 | to Italy 7.1972 (Caorle) |
| LST1176 | Graham County | 517 | Newport News | 4.2.1957 | 9.9.1957 | 17.4.1958 | patrol craft tender 1972 |
| LST1177 | Lorain County | 872 | American SB, Lorain | 9.8.1956 | 22.6.1957 | 3.10.1958 | to MARAD 12.1994 |
| LST1178 | Wood County | 873 | American SB, Lorain | 1.10.1956 | 14.12.1957 | 5.8.1959 | stricken 2.1989 |
|
Displacement standard, t |
3859 |
|
Displacement full, t |
7854 |
|
Length, m |
129.9 wl 134.8 oa |
|
Breadth, m |
18.9 |
|
Draught, m |
4.10 |
|
No of shafts |
2 |
|
Machinery |
LST1171, 1174-1178: 6 Cooper Bessemer diesels LST1173: 6 Fairbank Morse diesels |
|
Power, h. p. |
15000 |
|
Max speed, kts |
17.2 |
|
Fuel, t |
diesel oil |
| Endurance, nm(kts) | |
|
Armament |
3 x 2 - 76/50 Mk 33, helicopter deck |
| Military load | 23 tanks or 2000t of cargo, 634 marines, 4 LCVP |
|
Electronic equipment |
SPS-35, 2x Mk 34 radars |
|
Complement |
185 |
Project history: These SCB-119 LSTs of FY54 (prototype) and FY55 showed little speed improvement over their predecessors (17kts at more than double the power) but were designed for better sea keeping, and in particular for less pounding at high sustained speed. They were fully air conditioned, and two of them could carry as many troops as an APA plus an AKA, as well as more vehicles. They were designed to carry four landing craft in davits, a 53.4m pontoon causeway on the side, and two powered pontoon barges and an LCU as deck cargo for side-launching. In addition, they could accept up to five helicopters landing on deck. LST1172 was cancelled in 1955.
Even at 17kts, these ships could not operate effectively with the 20kt amphibious force, and they were discarded with the advent of the fast Newport class LSTs.
Modernizations: None.
Naval service: No significant events.
Suffolk County 1971
© Ivan Gogin, 2015