A PT boat was a motor torpedo boat used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered at the beginning of the war by ineffective torpedoes, limited armament, and comparatively fragile construction that limited some of the variants to coastal waters. In the USN they were organized in Motor Torpedo Boat Squadrons (MTBRONs).
USS Permit (SS-178), a Porpoise-class submarine, was the first ship of the United States Navy to be named for the permit.
Motor Torpedo Boat Squadron Three was a United States Navy squadron based at Cavite, Philippines, from September 1941 to mid-April 1942. It was commanded by Lieutenant John D. Bulkeley and made up of six motor torpedo boats: PT-31, PT-32, PT-33, PT-34, PT-35, and PT-41, the last as the squadron flagship. The other six boats of the squadron remained at Pearl Harbor, Hawaii, and were there when war broke out, eventually being shipped to the Solomons.
I-68, later renumbered I-168, was an Imperial Japanese Navy Kaidai–type cruiser submarine of the KD6 sub-class commissioned in 1934. She served in World War II, operating in support of the Japanese attack on Pearl Harbor and taking part in the Battle of Midway, the Guadalcanal campaign, and the Aleutian Islands campaign before she was sunk in 1943. She is best known for her achievements during the Battle of Midway when, under the command of Lieutenant Commander Yahachi Tanabe, she sank the only United States Navy warships lost in the battle: the already badly damaged aircraft carrier USS Yorktown (CV-5) and the destroyer USS Hammann (DD-412).
USS Varuna (AGP-5) was a Portunus-class motor torpedo boat tender of the United States Navy during World War II.
The second I-22 was one of five Type C cruiser submarines of the C1 sub-class built of the Imperial Japanese Navy. During World War II, she operated as the mother ship for a midget submarine during the attack on Pearl Harbor and the attack on Sydney Harbour, supported Japanese forces during the Battle of the Coral Sea, and served in the Guadalcanal campaign. She was sunk in October 1942.
The second I-24 was one of five Type C cruiser submarines of the C1 sub-class built for the Imperial Japanese Navy. During World War II, she operated as the mother ship for a midget submarine during the attack on Pearl Harbor and the attack on Sydney Harbour, supported Japanese forces during the Battle of the Coral Sea and the Battle of the Santa Cruz Islands, and served in the Guadalcanal campaign, New Guinea campaign, and Aleutian Islands campaign. She was sunk in June 1943.
I-74, later I-174, was an Imperial Japanese Navy Kaidai type cruiser submarine of the KD6B sub-class commissioned in 1938. During World War II, she took part in the attack on Pearl Harbor, the Battle of Midway, the Guadalcanal campaign, the New Guinea campaign, and the Gilbert and Marshall Islands campaign and operated off Australia before she was sunk during her ninth war patrol in 1944.
I-9 was an built for the Imperial Japanese Navy Type A1 submarine commissioned in 1941. She saw service during World War II, including operations related to the attack on Pearl Harbor, a patrol off the United States West Coast, and in Operation K. She also took part in the Aleutians campaign and the Guadalcanal campaign before she was sunk in June 1943.
I-73 was an Imperial Japanese Navy Kaidai type cruiser submarine of the KD6A sub-class commissioned in 1937 that served during World War II. One month after participating in the Japanese attack on Pearl Harbor, she was sunk by the United States Navy submarine USS Gudgeon (SS-211) in January 1942.
I-56, later I-156, was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3B sub-class commissioned in 1929. During World War II, she supported Japanese forces during the invasion of Malaya in December 1941, the Dutch East Indies campaign in early 1942, and the Battle of Midway in June 1942. Except for brief service in the Aleutian Islands campaign in 1943, she subsequently served on training duties until selected for use as a kaiten manned suicide torpedo carrier in 1945. She surrendered to the Allies in 1945 after the end of the war and was scuttled in 1946.
VPB-44 was a Patrol Bombing Squadron of the U.S. Navy. The squadron was established as Patrol Squadron 44 (VP-44) on 3 June 1941, redesignated Patrol Bombing Squadron 44 (VPB-44) on 1 October 1944 and disestablished on 20 June 1945.
I-75, later I-175, was an Imperial Japanese Navy Kaidai-type cruiser submarine of the KD6B sub-class commissioned in 1938. During World War II, she took part in the attack on Pearl Harbor, the Battle of Midway, the Guadalcanal campaign, the Aleutian Islands campaign, and the Gilbert and Marshall Islands campaign and operated off Australia, before she was sunk in 1944 during her tenth war patrol. She is best known for sinking the United States Navy escort carrier USS Liscome Bay on 24 November 1943.
PT-20 was the first PT-20-class motor torpedo boat of the United States Navy that served during World War II. Her first post was at Pearl Harbor PT Boat Base.
PT-30 was a PT-20-class motor torpedo boat of the United States Navy American that served during World War II.
PT-29 was a PT-20-class motor torpedo boat of the United States Navy American that served during World War II.
PT-143 was a PT-103-class motor torpedo boat of the United States Navy that served during World War II.
Q-111 Luzon was a motor torpedo boat of the United States Army during World War II as part of the Offshore Patrol based at Manila.
I-69, later I-169, was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD6 sub-class commissioned in 1935. She served in World War II, during which she conducted six war patrols and took part in operations supporting the attack on Pearl Harbor, the Battle of Midway, the Guadalcanal campaign, the Aleutians campaign, and the defense of the Gilbert Islands. She sank in a diving accident in April 1944.
I-71, later I-171, was a Kaidai-class cruiser submarine of the KD6 sub-class built for the Imperial Japanese Navy during the 1930s. She served in World War II, and took part in operations supporting the attack on Pearl Harbor, the Battle of Midway, and the Aleutian Islands campaign. She was sunk in February 1944.
United States
