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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

Landing Ship Medium
Uss LSM-437
USS LSM-437 underway after World War II

<tr> <th colspan="2" height="30" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">General characteristics </th></tr><tr style="vertical-align:top;"><td>Class & type:</td><td> LSM-1 class Landing Ship Medium</td></tr><tr style="vertical-align:top;"><td>Displacement:</td><td> 530 long tons (539 t) empty
900 long tons (914 t) loaded</td></tr><tr style="vertical-align:top;"><td>Length:</td><td> 203 ft 6 in (62.03 m)</td></tr><tr style="vertical-align:top;"><td>Beam:</td><td> 34 ft (10 m)</td></tr><tr style="vertical-align:top;"><td>Draft:</td><td> 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</td></tr><tr style="vertical-align:top;"><td>Propulsion:</td><td> Fairbanks-Morse or GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws</td></tr><tr style="vertical-align:top;"><td>Speed:</td><td> 13.3 knots (24.6 km/h; 15.3 mph)</td></tr><tr style="vertical-align:top;"><td>Range:</td><td> 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph)</td></tr><tr style="vertical-align:top;"><td>Capacity:</td><td> 5 × medium tanks or
3 × heavy tanks (150 tons max. payload, beaching) or
6 × LVTs or
9 × DUKWs</td></tr><tr style="vertical-align:top;"><td>Troops:</td><td> 54 troops</td></tr><tr style="vertical-align:top;"><td>Complement:</td><td> 4 officers, 54 enlisted</td></tr><tr style="vertical-align:top;"><td>Armament:</td><td> • 2 × 40 mm AA guns
• 4 × 20 mm AA guns</td></tr> }}

List of LSM-1 class shipsEdit

LSM(R)-188 Class Landing Ship Medium (Rocket)Edit

Landing Ship Medium
Uss LSMR-194
USS LSM(R)-194 passing under the Cooper River Bridge, Charleston, SC, 2 December 1944

<tr> <th colspan="2" height="30" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">General characteristics </th></tr><tr style="vertical-align:top;"><td>Class & type:</td><td> LSM(R)-188 class Landing Ship Medium (Rocket)</td></tr><tr style="vertical-align:top;"><td>Displacement:</td><td> 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</td></tr><tr style="vertical-align:top;"><td>Length:</td><td> 203 ft 6 in (62.03 m)</td></tr><tr style="vertical-align:top;"><td>Beam:</td><td> 34 ft (10 m)</td></tr><tr style="vertical-align:top;"><td>Draft:</td><td> 5 ft 6 in (1.68 m) forward
5 ft 9 in (1.75 m) aft</td></tr><tr style="vertical-align:top;"><td>Propulsion:</td><td> GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws</td></tr><tr style="vertical-align:top;"><td>Speed:</td><td> 13.2 knots (24.4 km/h; 15.2 mph)</td></tr><tr style="vertical-align:top;"><td>Range:</td><td> 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph)</td></tr><tr style="vertical-align:top;"><td>Complement:</td><td> 5 officers, 76 enlisted</td></tr><tr style="vertical-align:top;"><td>Armament:</td><td> 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</td></tr> }}

LSM(R)-401 Class Landing Ship Medium (Rocket)Edit

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

<tr> <th colspan="2" height="30" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">General characteristics </th></tr><tr style="vertical-align:top;"><td>Class & type:</td><td> LSM-401(R) class Landing Ship Medium (Rocket)</td></tr><tr style="vertical-align:top;"><td>Displacement:</td><td> 1,175 long tons (1,194 t) loaded</td></tr><tr style="vertical-align:top;"><td>Length:</td><td> 203 ft 6 in (62.03 m)</td></tr><tr style="vertical-align:top;"><td>Beam:</td><td> 34 ft (10 m)</td></tr><tr style="vertical-align:top;"><td>Draft:</td><td> 7 ft 9 in (2.36 m)</td></tr><tr style="vertical-align:top;"><td>Propulsion:</td><td> GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws</td></tr><tr style="vertical-align:top;"><td>Speed:</td><td> 13 knots (24 km/h; 15 mph)</td></tr><tr style="vertical-align:top;"><td>Range:</td><td> 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph)</td></tr><tr style="vertical-align:top;"><td>Complement:</td><td> 6 officers, 137 enlisted</td></tr><tr style="vertical-align:top;"><td>Armament:</td><td> • 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</td></tr> }}

LSM(R)-501 Class Landing Ship Medium (Rocket)Edit

Landing Ship Medium
Uss Pee Dee River LSMR-517
USS Pee Dee River (LSM(R)-517) underway in 1954

<tr> <th colspan="2" height="30" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">General characteristics </th></tr><tr style="vertical-align:top;"><td>Class & type:</td><td> LSM-501(R) class Landing Ship Medium (Rocket)</td></tr><tr style="vertical-align:top;"><td>Displacement:</td><td> 1,175 long tons (1,194 t) loaded</td></tr><tr style="vertical-align:top;"><td>Length:</td><td> 203 ft 6 in (62.03 m)</td></tr><tr style="vertical-align:top;"><td>Beam:</td><td> 34 ft 6 in (10.52 m)</td></tr><tr style="vertical-align:top;"><td>Draft:</td><td> 7 ft 9 in (2.36 m)</td></tr><tr style="vertical-align:top;"><td>Propulsion:</td><td> GM Cleveland diesel engines, 2,800 shp (2,088 kW), direct drive, 2 screws</td></tr><tr style="vertical-align:top;"><td>Speed:</td><td> 13 knots (24 km/h; 15 mph)</td></tr><tr style="vertical-align:top;"><td>Range:</td><td> 5,000 nmi (9,300 km) at 7 kn (13 km/h; 8.1 mph)</td></tr><tr style="vertical-align:top;"><td>Complement:</td><td> 6 officers, 137 enlisted</td></tr><tr style="vertical-align:top;"><td>Armament:</td><td> • 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</td></tr> }}

Gypsy Class Salvage Lifting VesselsEdit

Landing Ship Medium
Uss Gypsy ARS(D)-1
USS Gypsy (ARS(D)-1) underway at Houston, Texas, in 1946

<tr> <th colspan="2" height="30" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">General characteristics </th></tr><tr style="vertical-align:top;"><td>Class & type:</td><td> Gypsy-class Salvage Lifting Vessels</td></tr><tr style="vertical-align:top;"><td>Displacement:</td><td> 816 long tons (829 t)</td></tr><tr style="vertical-align:top;"><td>Length:</td><td> 224 ft 9 in (68.50 m)</td></tr><tr style="vertical-align:top;"><td>Beam:</td><td> 34 ft 10 in (10.62 m)</td></tr><tr style="vertical-align:top;"><td>Draft:</td><td> 8 ft 4 in (2.54 m)</td></tr><tr style="vertical-align:top;"><td>Propulsion:</td><td> Fairbanks-Morse diesel engines, 1,440 shp (1,074 kW), direct drive, 2 screws</td></tr><tr style="vertical-align:top;"><td>Speed:</td><td> 13 knots (24 km/h; 15 mph)</td></tr><tr style="vertical-align:top;"><td>Range:</td><td> 4,900 nmi (9,100 km) at 12 kn (22 km/h; 14 mph)</td></tr><tr style="vertical-align:top;"><td>Complement:</td><td> 65 officers and enlisted</td></tr><tr style="vertical-align:top;"><td>Armament:</td><td> 2 × 20 mm AA guns</td></tr> }}

See alsoEdit

ReferencesEdit

External linksEdit

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