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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.

LSM-1 Class Landing Ship Medium (Transport)[edit | edit source]

Landing Ship Medium
USS LSM-437, of the LSM-1 Class, while underway after World War II
USS LSM-437 underway after World War II

General characteristics Class & type: LSM-1 class Landing Ship MediumDisplacement: 530 long tons (539 t) empty
900 long tons (914 t) loadedLength: 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) aftPropulsion: Fairbanks-Morse or GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screwsSpeed: 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 × DUKWsTroops: 54 troopsComplement: 4 officers, 54 enlistedArmament: • 2 × 40 mm AA guns
• 4 × 20 mm AA guns }}

List of LSM-1 class ships[edit | edit source]

LSM(R)-188 Class Landing Ship Medium (Rocket)[edit | edit source]

Landing Ship Medium
USS LSM(R)-194, of the LSM(R)-188 Class, passing under the Cooper River Bridge, Charleston, SC, 2 December 1944.
USS LSM(R)-194 passing under the Cooper River Bridge, Charleston, SC, 2 December 1944

General characteristics Class & 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) loadedLength: 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) aftPropulsion: GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screwsSpeed: 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 enlistedArmament: 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 }}

LSM(R)-401 Class Landing Ship Medium (Rocket)[edit | edit source]

Landing Ship Medium
USS LSM(R)-409, of the LSM(R)-401 class, underway off San Diego, California on 25 February 1954
USS LSM(R)-409 underway off San Diego, California on 25 February 1954

General characteristics Class & type: LSM-401(R) class Landing Ship Medium (Rocket)Displacement: 1,175 long tons (1,194 t) loadedLength: 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 screwsSpeed: 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 enlistedArmament: • 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 }}

LSM(R)-501 Class Landing Ship Medium (Rocket)[edit | edit source]

Landing Ship Medium
USS Pee Dee River (LSM(R)-517), of the LSM(R)-501 class, underway in 1954
USS Pee Dee River (LSM(R)-517) underway in 1954

General characteristics Class & type: LSM-501(R) class Landing Ship Medium (Rocket)Displacement: 1,175 long tons (1,194 t) loadedLength: 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 screwsSpeed: 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 enlistedArmament: • 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 }}

Gypsy Class Salvage Lifting Vessels[edit | edit source]

Landing Ship Medium
USS Gypsy (ARS(D)-1), lead ship of the Gypsy class, underway at Houston, TX, in 1946.
USS Gypsy (ARS(D)-1) underway at Houston, Texas, in 1946

General characteristics Class & type: Gypsy-class Salvage Lifting VesselsDisplacement: 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 screwsSpeed: 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 enlistedArmament: 2 × 20 mm AA guns }}

See also[edit | edit source]

References[edit | edit source]

  • LSM-LSMR: WWII Amphibious Forces, Turner Publishing Co.; Paducah, Kentucky, ISBN 1-56311-140-3
  • Jane's Fighting Ships, 1980–81

External links[edit | edit source]

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