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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
AMPHIBIOUS SHIPS AND CRAFT
DE SOTO COUNTY tank landing ships (1957 - 1959)


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Suffolk County 1971

Ships


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


Technical data


Displacement standard, t3859
Displacement full, t7854
Length, m

129.9 wl 134.8 oa

Breadth, m

18.9

Draught, m

4.10

No of shafts2
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 load23 tanks or 2000t of cargo, 634 marines, 4 LCVP
Electronic equipmentSPS-35, 2x Mk 34 radars
Complement185


Standard scale images


<i>Suffolk County </i>1963
Suffolk County 1963
<i>Suffolk County </i>1979
Suffolk County 1979
<i>York County </i>1960
York County 1960


Graphics


<i>Suffolk County </i>1971
Suffolk County 1971


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.