USS San Marcos LSD-25 Reunion Association
Displacement
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4,032 (light draft)
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7,930 (seagoing - loaded)
Length 457' 9" o.a.
Beam 72"
Draft
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8' 2 ½" fwd, 10' ½" aft (light draft)
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15' 5 ½" fwd, 16' 2" aft (seagoing loaded)
Speed 17 kts (design speed)
Endurance 8,000 miles @ 15 knots
Complement
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Officers 17
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Enlisted 237
Troop Accommodations
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Officers 22
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Enlisted 218
Well Deck Capacity (varies with mission)
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three LCT (Mk V or VI) each w/ 5 medium tanks or
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two LCT (Mk III or IV) each w/ 12 medium tanks or
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fourteen LCM (Mk III) each w/ 1 medium tank or 1, 500 long tons cargo or
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forty-seven DUKW or
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forty-one LVT or
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Any combination of landing vehicles and landing craft up to capacity
Armament
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one single 5"/38 cal dual purpose gun mount in open tub (w/director)
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two quad 40mm AA gun mounts (w/directors)
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two twin 40mm AA gun mounts (w/directors)
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sixteen single 20mm AA gun mounts (local control)
Fuel Capacities
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NSFO 11,720 Bbls
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Diesel 160 Bbls
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Gasoline 5,085 Gals
Propulsion
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two Newport News Shipbuilding steam turbines
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two Babcock and Wilcox oil fired D-type boilers, two drum, single furnace, single uptake, 250psi
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single Newport News Shipbuilding Main Reduction Gears
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two turbo-drive 300Kw 120V/240V D.C. Ship' Service Generators
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twin propellers, 7,000shp
Aircraft (LSDs 1-25 still in commission in late 40's or early 50's) were fitted/retro-fitted with a prefabricated steel grated "Portable Deck" suspended between the wing walls and supported by removable I-beam girders. The aft end of the portable deck contained a wooden helicopter platform, enabling the ship to land and launch one helicopter at a time. Stowage of helicopters consisted of enough space to store eight USMC Sikorsky UH-34 helicopters in the well deck forward of the "water barrier". Aircraft were lifted to the flight deck with 35 ton truck cranes. Aircraft servicing was limited to re-fueling. With portable deck and aircraft platform installed, the Landing Ship Dock was still capable of transporting, launching and repairing smaller amphibious craft and vehicles up to the size of a Landing Craft, Utility (LCU) in their well deck. (Source: http://www.navsource.org/archives/10/12/1225.htm)