Landing Ship Medium

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)

Main article: LSM-1 Class Landing Ship Medium

USS LSM-437 underway after World War II
General characteristics
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

List of LSM-1 class ships

(LSM-275), later reclassified (ARC-1) (LSM-445), later reclassified (YV-1) (LSM-446), later reclassified (E-LSM-446) and again to (YV-2) edit] LSM(R)-188 Class Landing Ship Medium (Rocket) USS LSM(R)-194 passing under the Cooper River Bridge, Charleston, SC, 2 December 1944 General characteristics 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)-188 USS LSM(R)-189 USS LSM(R)-190 USS LSM(R)-191 USS LSM(R)-192 USS LSM(R)-193 USS LSM(R)-194 USS LSM(R)-195 USS LSM(R)-196 USS LSM(R)-197 USS LSM(R)-198 USS LSM(R)-199 LSM(R)-401 Class Landing Ship Medium (Rocket) USS LSM(R)-409 underway off San Diego, California on 25 February 1954 General characteristics 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 (LSM(R)-401), later reclassified (LFR-401) (LSM(R)-402) (LSM(R)-403) (LSM(R)-404), later reclassified (LFR-404) (LSM(R)-405), later reclassified (LFR-405) (LSM(R)-406) (LSM(R)-407) (LSM(R)-408) USS Clarion River (LSM(R)-409), later reclassified (LFR-409) (LSM(R)-410) (LSM(R)-411) (LSM(R)-412), later reclassified (LFR-412) LSM(R)-501 Class Landing Ship Medium (Rocket) USS Pee Dee River (LSM(R)-517) underway in 1954 General characteristics 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 (LSM(R)-501), later reclassified (IX-501) (LSM(R)-502) (LSM(R)-503) (LSM(R)-504) (LSM(R)-505) (LSM(R)-506) USS Greenbrier River (LSM(R)-507) USS Gunnison River (LSM(R)-508), later reclassified and renamed USS Targeteer (YV-3) (LSM(R)-509) (LSM(R)-510) (LSM(R)-511) (LSM(R)-512), later reclassified (LFR-512) (LSM(R)-513), later reclassified (LFR-513) (LSM(R)-514) (LSM(R)-515), later reclassified (LFR-515) (LSM(R)-516) USS Pee Dee River (LSM(R)-517) (LSM(R)-518) USS Powder River (LSM(R)-519) (LSM(R)-520) (LSM(R)-521) (LSM(R)-522), later reclassified (LFR-522) (LSM(R)-523) USS Saint Croix River (LSM(R)-524) (LSM(R)-525), later reclassified (LFR-525) (LSM(R)-526) USS St. Joseph's River (LSM(R)-527) USS St. Marys River (LSM(R)-528) USS St. Regis River (LSM(R)-529) (LSM(R)-530) (LSM(R)-531), later reclassified (LFR-531) (LSM(R)-532) (LSM(R)-533) (LSM(R)-534) (LSM(R)-535) (LSM(R)-536), later reclassified (LFR-536) Gypsy Class Salvage Lifting Vessels USS Gypsy (ARS(D)-1) underway at Houston, Texas, in 1946 General characteristics 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 USS Gypsy (ARS(D)-1), authorized as LSM-549 USS Mender (ARS(D)-2), authorized as LSM-550 USS Salvager (ARS(D)-3), authorized as LSM-551, later reclassified to YMLC-3 USS Windlass (ARS(D)-4), authorized as LSM-552, later reclassified to YMLC-4 See also Landing Ship, Infantry Mark 8 Landing Craft Tank References LSM-LSMR: WWII Amphibious Forces, Turner Publishing Co.; Paducah, Kentucky, ISBN 1-56311-140-3 Jane's Fighting Ships, 1980-81 External links USS LSM/LSMR Association NavSource Photo Archives Landing Ships ibiblio.org My Life Aboard the LSM-319 by Eugene Carey The Navy's Smallest Aircraft Carrier, July 1958, Popular Mechanics small article on conversion of LSM-445 to a target drone launching vessel Wikimedia Foundation. 2010. 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