Landing Ship, Medium

USS LSM-175 underway off Charleston Navy Yard in 1944.
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

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)-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

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

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

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.

One LSM, USS LSM-45 survived in its original configuration until around 2010. It was 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 was scrapped between 2010 and 2014.