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| HMS Tracker | |
|---|---|
| Ship name | HMS Tracker |
| Caption | HMS Tracker in service |
| Ship class | Attacker-class escort carrier |
| Ship tonnage | 13,455 tons (full load) |
| Ship length | 495 ft |
| Ship beam | 69 ft |
| Ship propulsion | Steam turbines |
| Ship speed | 18 knots |
| Ship complement | 646 officers and ratings |
| Ship armament | 2 × 4 in AA, 8 × 20 mm Oerlikon, depth charge throwers |
| Ship aircraft | 18–24 aircraft |
| Ship builder | Western Pipe and Steel Company |
| Ship launched | 1942 |
| Ship commissioned | 1943 |
| Ship decommissioned | 1946 |
HMS Tracker was an Attacker-class escort carrier of the Royal Navy that served during the Second World War. Built in the United States under the Lend-Lease arrangement and transferred to the Royal Navy, she operated in the Atlantic Ocean, Arctic Ocean, and the English Channel, escorting convoys and supporting amphibious operations. Tracker hosted Fleet Air Arm and Royal Navy squadrons, flying Supermarine Seafire, Fairey Swordfish, and Grumman Wildcat types in anti-submarine and air-cover roles.
Tracker was laid down at the Western Pipe and Steel Company shipyard in San Francisco as part of a US-built class derived from C3-class merchant ship hulls designed by Gulf Shipbuilding Corporation and adapted for escort duties. The design emphasized a compact flight deck and an enclosed hangar to operate up to 24 aircraft including Fairey Fulmar, Grumman Martlet, and Vought F4U Corsair variants used by Royal Navy Fleet Air Arm squadrons such as 802 NAS and 829 NAS. Propulsion was provided by steam turbine machinery similar to contemporary destroyer escort auxiliary systems, yielding about 17–18 knots suitable for convoy escort with endurance to cross the North Atlantic laden with aviation fuel and ordnance. Defensive armament combined medium-calibre dual-purpose guns inspired by QF 4-inch Mk XVI patterns and multiple Oerlikon 20 mm cannon mounts for close-in anti-aircraft defence against Luftwaffe and Kriegsmarine threats.
Upon commissioning into the Royal Navy in 1943 under a British commanding officer, Tracker joined Western Approaches Command and operated with escort groups assigned to transatlantic convoys between Liverpool and New York City as well as Arctic runs to Murmansk and Archangelsk. Aircraft from Tracker conducted anti-submarine warfare patrols against U-boat wolfpacks coordinated by Commander-in-Chief, Western Approaches and provided air cover during convoy battles such as operations involving PQ convoys and JW convoys. Later Tracker supported Operation Overlord preparations in the Solent and off the Normandy embarkation areas by providing fighter cover, close air support, and reconnaissance in coordination with Combined Operations Headquarters and Allied Expeditionary Air Force elements. Her air group worked with squadrons from HMS Furious carriers, cooperating with Royal Canadian Navy escort vessels and United States Navy destroyers during multi-national tasking.
Tracker’s aircraft participated in multiple convoy actions against German U-boat attacks in the mid-Atlantic and Arctic theatre where coordination with Bletchley Park signals intelligence and HF/DF direction-finding vectored aircraft to contacts. During one engagement, Tracker’s Fairey Swordfish and Seafire sorties helped repel a coordinated attack involving Ju 88 and Heinkel He 111 bombers attempting to strike a northbound convoy; fighter cover routed the strike and anti-submarine patrols forced a Type VII U-boat to evade. In support of Operation Dragoon planning and subsequent Channel operations, Tracker provided combat air patrols that intercepted Luftwaffe reconnaissance and light attack sorties, cooperating with RAF Coastal Command patrols and No. 24 Group RAF. Her aircraft were credited with several anti-submarine contacts leading to depth-charge attacks prosecuted by escorts including the Hunt-class and Flower-class corvettes.
Throughout wartime service Tracker underwent several refits at Rosyth and Govan yards to upgrade radar suites, communications, and anti-aircraft armament. Installations included improved Type 277 radar for surface warning and Type 291 radar air warning linked to fighter direction facilities similar to those aboard HMS Illustrious and updated Identification Friend or Foe gear compatible with Allied Expeditionary Air Force control. Armour and structural strengthening adapted the flight deck for heavier Seafire II and Wildcat VI operations; hangar lifts and arrestor gear were modified following operational feedback from Commander-in-Chief, Home Fleet staff and Fleet Air Arm maintenance units. During a refit she also received augmented galley and medical facilities reflecting casualty experiences shared with hospital ships such as HMHS Oxfordshire.
After the German Instrument of Surrender and the end of major Atlantic campaign operations, Tracker was returned to the United States Navy per Lend-Lease terms and decommissioned from Royal Navy service in 1946. Struck from active lists, she entered reserve before being sold for civilian conversion and later scrapped amid postwar reductions in naval tonnage paralleled by disposals of sister ships like HMS Activity and HMS Archer. Her legacy endures in Fleet Air Arm records, convoy action reports archived with National Archives (United Kingdom), and memorials commemorating escort carrier contributions to Battle of the Atlantic convoy protection.
Category:Attacker-class escort carriers Category:Royal Navy ships of World War II