PT boat

PT boat
Post-Work: User:W.wolny · Public domain · source
Ship name	PT boat
Builder	Elco, Higgins, Huckins, Vosper
Operator	United States Navy, Royal Navy
Country	United States
Type	Motor Torpedo Boat
Displacement	50–100 tons
Length	70–80 ft (varies by class)
Beam	15–20 ft
Propulsion	Packard or multiple gasoline engines
Speed	36–50 knots
Armament	torpedoes, guns, depth charges
Complement	12–20

PT boat A PT boat was a fast, gasoline-powered motor torpedo craft used extensively by the United States Navy and allied services during World War II. Combining high speed, light displacement, and concentrated offensive armament, these boats operated in the Pacific, Mediterranean, and English Channel theaters. Their operations involved torpedo attacks, reconnaissance, gun engagements, and special operations in littoral waters.

Design and Construction

Design and Construction discusses rapid production by private yards such as Elco, Higgins Industries, Huckins Boat Company, and Vosper & Company for procurement by the United States Navy and transfer to partners like the Royal Navy and Free French Naval Forces. Naval architects adapted concepts from earlier motor torpedo boat designs and lessons from the Dunkirk evacuation and interwar trials, emphasizing wooden hulls built with mahogany or cedar planking over frames to reduce magnetic signature and radar cross-section. Designers balanced hull form for planing at high speeds with structural integrity to withstand combat damage and heavy seas encountered in operations from the Solomon Islands to the English Channel. Propulsion installations often used supercharged Packard Motor Car Company marine engines mounted with multiple shafts to achieve the required 36–50 knot dash speed for torpedo attack runs and evasive maneuvers.

Armament and Equipment

Armament and Equipment covers the mix of offensive and defensive weapons fitted aboard, including Mark 8 and later Mark 13 torpedoes issued from wooden or metal roll-off launchers and tubes adapted for short-range attacks popularized during actions near Guadalcanal and in the Philippine campaign. Close-range firepower included 20 mm Oerlikon and 40 mm Bofors autocannons, multiple .50 caliber Browning machine guns, and in some refits 37 mm and 57 mm guns salvaged from destroyer inventories or produced by General Electric. Depth charges, smoke generators, and radar sets by firms like RCA and Magneto allowed night interception and antisubmarine tasks in coordination with PT boat squadrons and coastal commands. Communications gear linked boats to headquarters such as Commander, Motor Torpedo Boat Squadrons, Pacific Fleet and supported combined operations with units from United States Army Air Forces and Royal Australian Navy.

Operational History

Operational History recounts engagements across major World War II campaigns, from early trials in the Atlantic Charter era to intense combat in the Solomon Islands campaign, interdiction in the South West Pacific Area, and raids in the Mediterranean Sea supporting the Sicily Campaign and operations around Anzio. PT boats performed night torpedo attacks against larger capitol ships, conducted evacuation missions like those associated with Guadalcanal and small-unit raids tied to Underwater Demolition Teams, and executed blockade running and insertion of intelligence teams for the Office of Strategic Services. Famous encounters include interdiction of Japanese supply barges in the New Georgia campaign and the controversial engagement leading to the loss of a high-profile officer during operations near Leyte Gulf. Coordination with carriers from Task Force 58 and shore-based command centers enhanced their utility despite vulnerability to air attack and heavy-caliber gunfire during daylight.

Notable Classes and Vessels

Notable Classes and Vessels lists major builders and exemplars such as the 80-foot ELCO type, the 78-foot Higgins type, and British-built Vosper designs supplied to Royal Navy Coastal Forces. Famous individual hulls include boats associated with personalities and events tied to John F. Kennedy's wartime service, the small flotillas credited in actions around Kolombangara, and preserved museum craft displayed at institutions like the National Naval Aviation Museum and regional museums in Maine and California. Class differences reflected variations in engine layout, torpedo capacity, and gun fits driven by operational lessons learned in the Pacific War and adaptations for the English Channel theater.

Crews and Life Aboard

Crews and Life Aboard describes complements of officers and enlisted sailors drawn from communities across the United States and allied nations, trained at centers such as Motor Torpedo Boat Squadrons Training Center, Melville. Life aboard small wooden hulls involved cramped quarters, exposure to fuel fumes from Packard engines, and rapid watch rotations during nighttime patrols in waters off New Guinea, the Philippines, and the Solomons. Morale and improvisation were shaped by interactions with special operations units like the Office of Naval Intelligence detachments and allied liaison officers from the Royal Australian Navy. Casualty evacuation, emergency repairs, and ad hoc armament changes became routine as crews sought to extend operational readiness between tender repairs provided by destroyer tenders and depot ships such as USS Oak Hill.

Legacy and Influence on Naval Warfare

Legacy and Influence on Naval Warfare examines how fast attack craft concepts influenced Cold War-era missile boats produced by Soviet Union and NATO members, informing doctrine for littoral combatants and small-boat anti-surface strategies. Technologies and tactics pioneered on these vessels fed into development programs at institutions like the Naval War College and research at David Taylor Model Basin, shaping patrol boat designs, fast attack missile craft, and modern coastal defense thinking employed by navies including the Royal Navy and the Japanese Maritime Self-Defense Force. Preserved boats and commemorations by veterans’ organizations, naval museums, and historical societies maintain public awareness of their operational role during conflicts such as World War II.

Category:Patrol vessels