Landing Ship Medium were amphibious assault ships of the United States Navy in the World War II.
Of comparable size to Landing Ship, Tank and the Landing Craft, Infantry, there were 558 LSM (Landing Ship, Medium) made for the USN between 1944 and 1945. The majority of vessels built on this versatile frame were regular transports however there were several dozen that were converted during construction for specialized roles. Most vessels of this type were scrapped during the Cold War, but several were sold by the United States Department of Defense to foreign nations or private shipping companies.
Only one LSM, USS LSM-45 is known to still exist in its original configuration. It is in storage at Marine Station Camp Lejeune in Jacksonville, NC. It was slated to become the centerpiece of the Museum of the Marine, but due to changed plans, is now in danger of being scrapped or sunk as an artificial reef.
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USS LSM-437 underway after World War II |
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General characteristics | |
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Class and type: | LSM-1 class Landing Ship Medium |
Displacement: | 530 long tons (539 t) empty 900 long tons (914 t) loaded |
Length: | 203 ft 6 in (62.03 m) |
Beam: | 34 ft (10 m) |
Draft: | Landing : 3 ft 6 in (1.07 m) forward 7 ft 8 in (2.34 m) aft Full load : 6 ft 4 in (1.93 m) forward 8 ft 3 in (2.51 m) aft |
Propulsion: | Fairbanks-Morse or GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws |
Speed: | 13.3 knots (24.6 km/h; 15.3 mph) |
Range: | 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph) |
Capacity: | 5 × medium tanks or 3 × heavy tanks (150 tons max. payload, beaching) or 6 × LVTs or 9 × DUKWs |
Troops: | 54 troops |
Complement: | 4 officers, 54 enlisted |
Armament: | • 2 × 40 mm AA guns • 4 × 20 mm AA guns |
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USS LSM(R)-194 passing under the Cooper River Bridge, Charleston, SC, 2 December 1944 |
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General characteristics | |
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Class and type: | LSM(R)-188 class Landing Ship Medium (Rocket) |
Displacement: | LSM(R)-188 to LSM(R)-195 : 968 long tons (984 t) loaded LSM(R)-196 to LSM(R)-199 : 1,008 long tons (1,024 t) loaded |
Length: | 203 ft 6 in (62.03 m) |
Beam: | 34 ft (10 m) |
Draft: | 5 ft 6 in (1.68 m) forward 5 ft 9 in (1.75 m) aft |
Propulsion: | GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws |
Speed: | 13.2 knots (24.4 km/h; 15.2 mph) |
Range: | 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph) |
Complement: | 5 officers, 76 enlisted |
Armament: | LSM(R)-188 to LSM(R)-195 : • 1 × 5"/38 caliber gun • 2 × 40 mm AA guns • 3 × 20 mm AA guns • 85 × Mk. 51 automatic rocket launchers LSM(R)-196 to LSM(R)-199 : • 1 × 5"/38 caliber gun • 2 × 40 mm AA guns • 75 × 4-rail Mk. 36 rocket launchers • 30 × 6-rail Mk. 30 rocket launchers • 85 × Mk. 51 automatic rocket launchers |
USS LSM(R)-409 underway off San Diego, California on 25 February 1954 |
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General characteristics | |
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Class and type: | LSM-401(R) class Landing Ship Medium (Rocket) |
Displacement: | 1,175 long tons (1,194 t) loaded |
Length: | 203 ft 6 in (62.03 m) |
Beam: | 34 ft (10 m) |
Draft: | 7 ft 9 in (2.36 m) |
Propulsion: | GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws |
Speed: | 13 knots (24 km/h; 15 mph) |
Range: | 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph) |
Complement: | 6 officers, 137 enlisted |
Armament: | • 1 × 5"/38 caliber guns • 2 × 40 mm AA guns • 4 × 20 mm AA guns • 4 × 4.2 in (110 mm) mortars • 8-10 × continuous loading 5-inch (130 mm) Ship-to-Shore rocket launchers |
USS Pee Dee River (LSM(R)-517) underway in 1954 |
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General characteristics | |
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Class and type: | LSM-501(R) class Landing Ship Medium (Rocket) |
Displacement: | 1,175 long tons (1,194 t) loaded |
Length: | 203 ft 6 in (62.03 m) |
Beam: | 34 ft 6 in (10.52 m) |
Draft: | 7 ft 9 in (2.36 m) |
Propulsion: | GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws |
Speed: | 13 knots (24 km/h; 15 mph) |
Range: | 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph) |
Complement: | 6 officers, 137 enlisted |
Armament: | • 1 × 5"/38 caliber gun • 4 × 40 mm AA guns • 8 × 20 mm AA guns • 4 × 4.2 in (110 mm) mortars • 20 × continuous loading 5-inch (130 mm) Ship-to-Shore rocket launchers |
USS Gypsy (ARS(D)-1) underway at Houston, Texas, in 1946 |
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General characteristics | |
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Class and type: | Gypsy-class Salvage Lifting Vessels |
Displacement: | 816 long tons (829 t) |
Length: | 224 ft 9 in (68.50 m) |
Beam: | 34 ft 10 in (10.62 m) |
Draft: | 8 ft 4 in (2.54 m) |
Propulsion: | Fairbanks-Morse diesel engines, 1,440 shp (1,074 kW), direct drive, 2 screws |
Speed: | 13 knots (24 km/h; 15 mph) |
Range: | 4,900 nmi (9,100 km) at 12 kn (22 km/h; 14 mph) |
Complement: | 65 officers and enlisted |
Armament: | 2 × 20 mm AA guns |
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