The landing craft, tank (or tank landing craft) was an amphibious assault craft for landing tanks on beachheads. They were initially developed by the British Royal Navy and later by the United States Navy during World War II in a series of versions. Initially known as the "tank landing craft" (TLC) by the British, they later adopted the U.S. nomenclature "landing craft, tank" (LCT). The United States continued to build LCTs post-war, and used them under different designations in the Korean and Vietnam Wars.

Contents

1 Development

1.1 Mark 1

1.2 Mark 2

1.3 Mark 3

1.4 Mark 4

1.5 Mark 5

1.6 Mark 6

1.7 Mark 7

1.8 Mark 8

1.9 Mark 9

2 Armament

3 Conversions and modifications

4 Post-war

5 Survivors

6 See also

7 References

8 Bibliography

9 External links

Development

Let there be built great ships which can cast upon a beach, in any weather, large numbers of the heaviest tanks.

— Winston Churchill, Memo to War Department, 1940[1]

In 1926, the first motor landing craft (MLC1) was built by the Royal Navy. It weighed 16 tons, with a draught of 6 feet 6 inches (1.98 m), and was capable of about 6 knots (11 km/h; 6.9 mph). It was later developed into the landing craft mechanised.

It was at the insistence of the British prime minister Winston Churchill in mid-1940 that the LCT was created. Its speed was 10 knots (19 km/h; 12 mph) on engines delivering about 700 hp (520 kW).[2] Designated the LCT Mark 1, 20 were ordered in July 1940 and a further 10 in October 1940.[3])

Mark 1

Class overview

Name: LCT Mark 1

Operators: Royal Navy

Built: 1940

Completed: 30

General characteristics [1]

Displacement: 372 long tons (378 t)

Length: 152 ft (46 m)

Beam: 29 ft (8.8 m)

Draught: 3 ft (0.91 m) (forward)

Propulsion: 2 × 350 hp (261 kW) Hall-Scott petrol engine, 2 shafts

Speed: 8 knots (15 km/h; 9.2 mph)

Range: 900 nmi (1,700 km; 1,000 mi)

Capacity: 250 long tons (254 t)

Complement: 12 (2 officers, 10 enlisted men)

Armament: 2 × single 2-pounder pom-pom

Armour:

Wheelhouse : 15 lb

Gunshield : 20 lb

The first LCT Mark 1 was launched by Hawthorn Leslie in November 1940.

Mark 2

Class overview

Name: LCT Mark 2

Operators: Royal Navy

Built: 1941

Completed: 73

General characteristics [1]

Displacement: 590 short tons (535 t)

Length: 159 ft 11 in (48.74 m)

Beam: 30 ft (9.1 m)

Draught: 3 ft 8 in (1.12 m) (forward)

Propulsion: 3 × 460 hp (343 kW) Paxman diesels or 350 hp (261 kW) Napier Lion petrol engines, 3 shafts

Speed: 10.5 knots (19.4 km/h; 12.1 mph)

Range: 2,700 nmi (5,000 km)

Capacity: 5 × 30-ton or 4 × 40-ton or 3 × 50-ton tanks or 9 trucks or 250 long tons (254 t) of cargo

Complement: 12

Armament: 2 × single 2-pounder pom-pom or 2 × single Bofors 40 mm guns

Armour:

Wheelhouse : 2.5 in (64 mm)

Gun shield : 2 in (51 mm)

The LCT Mark 2 was longer and wider than the Mark 1, with three Paxman diesel or Napier Lion petrol engines replacing the Hall-Scotts. At 2,700 nautical miles (5,000 km; 3,100 mi), it had three times the range of its predecessor. Seventy-three Mk.2s were built.[2]

LCT Mark 2

Mark 3

Class overview

Name: LCT Mark 3

Operators: Royal Navy

Built: 1941

Completed: 235

General characteristics [1]

Displacement: 640 long tons (650 t)

Length: 192 ft (59 m)

Beam: 30 ft (9.1 m)

Draught: 3 ft 10 in (1.17 m) (forward)

Propulsion: 2 × 460 hp (343 kW) Paxman diesels or Sterling petrol engines, 2 shafts

Speed: 9 knots (17 km/h; 10 mph)

Range: 2,700 nmi (5,000 km)

Capacity: 300 long tons (305 t) of cargo

Complement: 12

Armament: 2 × single 2-pounder pom-pom or 2 × single Bofors 40 mm guns

Armour:

Wheelhouse : 15 lb

Gun shields : 20 lb

With a length of 192 feet (59 m), the Mark 3 was 32-foot (9.8 m) longer than the Mark 2. Even with this extra weight, the vessel was slightly faster than the Mark 1. Two hundred and thirty-five Mk. 3s were built.[2]

Mark 4

Class overview

Name: LCT Mark 4

Operators: Royal Navy

Built: 1941–1942

Completed: 865

General characteristics [1]

Displacement: 586 long tons (595 t)

Length: 187 ft 3 in (57.07 m)

Beam: 38 ft 9 in (11.81 m)

Draught: 3 ft 8 in (1.12 m) (forward)

Propulsion: 2 × 460 hp (343 kW) Paxman diesel engines, 2 shafts

Speed: 8 knots (15 km/h; 9.2 mph)

Range: 1,100 nmi (2,000 km)

Capacity: 350 long tons (356 t) of cargo

Complement: 12

Armament: 2 × single Oerlikon 20 mm cannon or 2 × single Bofors 40 mm guns

Armour:

Wheelhouse : 15 lb

Gun shields : 15 lb

The Mark 4 had a much wider beam (38 ft 9 in (11.81 m)) than the Mark 3. Built for use in the English Channel, it had a displacement of 586 tons and was powered by two 460 hp Paxman diesels. With a capacity of 350 tons, it could carry nine M4 Sherman or six Churchill tanks. Eight hundred and sixty-five Mk.4s were built, the largest LCT production in British yards.[2]

Testing during the Dieppe Raid in 1942 revealed a lack of manoeuvreability, so further versions were shorter in length.[2]

Mark 5

LCT202.jpg

LCT-202 off the coast of England, 1944

Class overview

Name: LCT Mark 5

Operators:

 United States Navy

 Royal Navy

 Polish Navy

Built: 1942–1944

Completed: 470

General characteristics [1]

Displacement: 286 short tons (259 t) (landing)

Length: 117 ft 6 in (35.81 m)

Beam: 32 ft (9.8 m)

Draft:

2 ft 10 in (0.86 m) forward

4 ft 2 in (1.27 m) aft (landing)

Propulsion: 3 × 225 hp (168 kW) Gray marine diesels, 3 shafts

Speed: 8 knots (15 km/h; 9.2 mph)

Range: 700 nmi (1,300 km) at 7 kn (13 km/h)

Capacity: 5 × 30-ton or 4 × 40-ton or 3 × 50-ton tanks or 9 trucks or 150 short tons (136 t) of cargo

Complement: 13 (1 officer, 12 enlisted men)

Armament: 2 × single 20 mm AA gun mounts

Armor:

Wheelhouse 2.5 in (64 mm)

Gun shield 2 in (51 mm)

After World War II, eleven were used in 1950-1960 by the Polish Navy amphibious forces, with BDS, later ODS prefixes.[4]

Mark 6

Débarquement provence saint-raphael ile d'or.jpg

LCT-1141 unloading at Saint-Raphaël in southern France during Operation Dragoon, August 15, 1944

Class overview

Name: LCT Mark 6

Operators:

 United States Navy

 Royal Navy

 Soviet Navy

Built: 1943–1944

Completed: 960

General characteristics [1]

Displacement: 284 short tons (258 t)

Length: 119 ft 1 in (36.30 m)

Beam: 32 ft 8 in (9.96 m)

Draft: 3 ft 4 in (1.02 m) (forward)

Propulsion: 3 × 225 hp (168 kW) Gray marine diesels, 3 shafts

Speed: 7 knots (13 km/h; 8.1 mph)

Range: 700 nmi (1,300 km) at 7 kn (13 km/h)

Capacity: 150 short tons (136 t) of cargo

Complement: 12

Armament:

2 × single 20 mm AA gun mounts

Up to 4 × single 50 cal. machine guns

Armor:

Wheelhouse : 20 lb

Gun shields : 10 lb

Nine hundred and sixty Mk.6s were built. One hundred and sixty Mk.5 and Mk.6 LCTs were lend-leased to the Royal Navy,[2] and a small number to the Soviet Union.

Mark 7

Main article: Landing Ship Medium

USS LSM-437 underway

The Mark 7 was an even larger LCT that could carry troops. In 1944, when the Mk.7 design reached a length of 203 feet, its designation was changed to landing ship medium (LSM). The new variant could attain speeds of up to 12 knots and saw usage in the Pacific. 558 were built.[2]

Mark 8

Main article: Mark 8 Landing Craft Tank

The LCT Mark 8 HMAV Abbeville (L4041)

The 225-foot LCT Mark 8, intended for service in the Pacific, was developed by the British in 1944. One hundred and eighty-six Mk.8s were ordered; however, when the war ended, most were cancelled and scrapped, or sold directly into civilian service. Only 31 entered service with the Royal Navy.[2] Twelve were later transferred to the British Army; these were initially operated by the Royal Army Service Corps, then by the Royal Corps of Transport. Between 1958 and 1966, the other 19 ships were transferred to foreign navies or civilian companies, converted for other uses, or otherwise disposed of.

Mark 9

An even larger LCT Mark 9 was considered in 1944, but the design was never finalized and no examples were built.[2]

Armament

The LCTs had a variety of weapons, with the British 2-pounder pom-pom mounts being gradually replaced by the faster firing 20 mm Oerlikon. The 40 mm Bofors was also widely used, and proved that the LCT was an excellent gunfire support vessel.[2] Various machines guns were often mounted for self-defense from aircraft and small boats, often two to four in the .30-caliber (7.62mm) and .50-caliber (12.7mm) range depending on the operating country.

Conversions and modifications

LCT(R), T125 launching a rocket salvo (1943)

Several special purpose versions were created for use during the Normandy landings. The British created the Landing craft tank (rocket) (LCT(R)) modified to fire salvoes of three-inch RP-3 rockets,[2] while the landing craft guns (large) (LCG(L)) was armed with two QF 4.7 inch guns, eight Oerlikon 20 mm AA guns and two 2-pounder pom-poms.[5] These ships did not beach; their mission was close-in gunfire support.[6]

The landing craft tank (armored) (LCT(A)) was designed for use by the first wave and was equipped with additional armour protection for the crew stations and on the bows, while a heavy wooden ramp allowed the two forward tanks to fire forward. These were all U.S-built LCT Mk.5s, which had been lend-leased to the British for Mediterranean operations, then "reverse lend-leased" back to the U.S. for the invasion.[6]

The landing craft tank (self-propelled) (LCT(SP)) carried self-propelled guns for fire support; in U.S. vessels these were 155 mm, while the British used M7 105 mm self-propelled guns and called them landing craft tank (high explosive) (LCT(HE)). A related variant was the British landing craft tank (concrete buster) (LCT(CB)), which carried three British Sherman Firefly tanks fitted with the 17-pounder high velocity gun, specifically deployed to attack fortifications.[7] Other variants included the landing craft tank (hospital) (LCT(H)) for casualty evacuation, and one LCT served as a floating bakery at Normandy.[2]

Some LCTs with specialized weaponry were used as floating anti-aircraft batteries. These were often manned by mixed army and navy crews. Others were modified after the war for uses such as dredging.[2]

USS LCT-749 launched from on board USS LST-767, off Okinawa on 3 April 1945. The LCT had been put aboard the LST at Pearl Harbor on 10 December 1944.

Post-war

Unlike most wartime landing craft the LCT remained in active duty with the U.S. Navy after the war, and many LCTs were also loaned or given to the post-war navies of Allied countries.[2] In early 1949, their designation was changed to landing ship utility (LSU), and changed again in late 1949 to landing craft utility (LCU). New landing craft (the LCU 1488-, 1610-, 1627- and 1646-classes) were also built to a modified Mark 5 design. Some were later reclassified during the Vietnam War as harbor utility crafts (YFUs) as they no longer served in an amphibious assault role, but were used in harbor support roles such as transporting goods from supply ships.

In 1964, NASA converted an LCT Mk.5 for astronaut recovery training as MV Retriever.

Current tanks are mostly transported via Airlift or National Defense Reserve Fleet freighters (during the Persian Gulf War[8]) over long distances, but can be delivered by Landing Craft Air Cushion.

Survivors

As of August 2007,[9] at least one wartime LCT is still in use, the Mark 5 LCT-203, now renamed Outer Island, and operating on Lake Superior, working as a dredge and construction barge.[10] As of August 2016, the Mark 6 LCT-1433 was also in use as a fishing/merchant vessel in Kodiak, Alaska, having been renamed Cape Douglas. The British Mark 2, converted to LCT rocket LCT(2)(R) 147 served in the North Africa landings, then as a clandestine immigration ship post-war. She is now at the Clandestine Immigration and Naval Museum in Haifa, Israel. [11]

The British Mark 3 LCT 7074 served in Normandy and was decommissioned in 1948, and presented to the Master Mariners' Club of Liverpool to be used as their club ship and renamed Landfall. Later converted into a floating nightclub, in the late 1990s the vessel was acquired by the Warship Preservation Trust and was moored at Birkenhead. In January 2006, the Trust went into liquidation[12] and the ship was left to rot, and by April 2010 had sunk at her berth. The craft was refloated in East Float on 16 October 2014 and moved to Portsmouth for renovation.[13][14] LCT 7074's renovation was completed in Summer 2020 and she was moved to her new home at The D-Day Story museum in Southsea on 24 August 2020.[15]

In 2020, the wreck of an LCT was discovered off Bardsey Island, Wales at a depth of 90 metres (300 ft). The vessel is thought to be LCT 326, which disappeared on 31 January 1943 in heavy weather with the loss of all 14 crew.[16] The wreck is in two parts, separated by 130 metres (430 ft). This suggests the vessel was broken in two by the weather and the two halves remained afloat long enough to allow them to drift slightly apart.[17]