Atlantic
Subsequently repaired, Tripoli departed San Diego on 31 January, bound for the Panama Canal and duty with the Atlantic Fleet. She arrived at her new home port, Norfolk, Virginia on 16 February. Embarking Composite Squadron 13 (VC-13) - 13 Grumman FM-2 Wildcats and Grumman TBM Avengers - the carrier put to sea on 15 March as the center ship in Task Group 21.15 (TG 21.15). Supported by five destroyer escorts of Escort Division 7 (CortDiv 7), Tripoli patrolled west of the Cape Verde Islands to break up German U-boat refuelling activities in that area.
After providing air cover for a convoy routed to the British West Indies, Tripoli's Wildcats and Avengers searched the sea lanes northwest, southwest, and west of the Cape Verdes before putting into Recife, Brazil on 5 April, to refuel and provision. Back at sea again two days later, Tripoli continued the routine of daily launchings and recoveries of her aircraft, guarding the Allied sea lanes against the incursions of enemy U-boats.
About one hour before sunrise on 19 April, one of Tripoli's Avengers made radar contact with a German U-boat as the submarine cruised on the surface awaiting the arrival of her "Milch Cow" or refuelling partner. U-513 put up a spirited anti-aircraft barrage while the Avenger made three attacks. A pattern of rockets bracketed the submarine on the first pass as the Germans prepared to dive for comparative safety. On the second run, the aircraft's depth charges failed to release, giving the enemy submersible the time she needed to dive. The U-boat evaded the aircraft's last attack - a mine - but also missed her fuelling rendezvous with U-488.
Returning to Norfolk on 29 April, Tripoli underwent voyage repairs before embarking VC-6 - 12 Avengers and nine Wildcats. She then formed up with CortDiv 7 and departed Hampton Roads on 24 May for further searches in the vicinity of the Cape Verdes. Four days out, she changed course to intercept a German submarine estimated to be proceeding southwest from a position west of the Madeira Islands. When no contact was made by 30 May, Tripoli and her consorts steamed north to rendezvous with a convoy bound for Nova Scotia.
Following her return to Norfolk on 18 June, Tripoli spent two months in carrier qualification training off Quonset Point, Rhode Island, before making port again at Norfolk on 15 July. Embarking Composite Squadron 6, she conducted two weeks of pilot qualifications in the Chesapeake Bay area before departing Hampton Roads on 1 August, bound for her new base of operations, Recife.
Screened by O'Toole and Edgar G. Chase, the escort carrier proceeded south until 1 August, when O'Toole developed a sonar contact and gave chase. Aircraft from Tripoli laid patterns of sonobuoys at the initial contact point and dropped smoke floats and float lights on an oil slick. Picking up the "scent", O'Toole straddled the floats with her Hedgehog projectiles and depth charges and soon radioed victoriously "We hit the rodent!" A brief visual examination of the evidence - debris and a large quantity of diesel oil - satisfied the hunter-killer group that they had indeed sunk an enemy submarine. However, a post-war examination of German records did not confirm the kill. As night fell, Tripoli vectored two aircraft to another sonar contact by O'Toole, and four depth bombs were dropped - keeping another U-boat down and running.
Tripoli and her group then returned to Recife on 13 August, and reported for duty with Admiral Jonas H. Ingram's 4th Fleet. Designated as the center of TG 47.7, the escort carrier put to sea on 22 August with the four destroyer escorts of CortDiv 24 to operate against a homeward-bound German submarine estimated to pass at 25° south latitude and 5° west longitude.
After a fruitless search pursuing two fading sonar contacts in the mid-South Atlantic narrows, Tripoli and her group returned to Recife on 11 September for provisioning and fuelling. Underway again two days later, TG 47.7 headed out to conduct another search - this time along the estimated track of two U-boats slated to rendezvous for refuelling. One of the target U-boats was U-1062, bound from Penang, British Malaya with a cargo of valuable petroleum products for the German war effort. Ordered to fuelU-219, outward-bound for the Far East, U-1062 prepared to rendezvous with her smaller sister boat in the South Atlantic narrows - directly in the path of the Tripoli escort group.
Passing to the westward of the Cape Verdes, TG 47.7 made rendezvous with Mission Bay 's escort group to conduct a joint hunter-killer operation against the two enemy boats. Round-the-clock searches by radar-equipped Avengers continued until 40 minutes after sunset on 28 September, when an Avenger piloted by Lieutenant William R. Gillespie reported a definite contact with the surfaced U-219 only 11 miles from the enemy's estimated track.
Gillespie went in to conduct a low-level rocket attack, but was shot down by heavy flak. Another Avenger, drawn to the battle, braved the flak to conduct another rocket run and also dropped depth bombs, while a Wildcat strafed the U-boat which struggled desperately to dodge the harassing attacks by the American aircraft.
U-219 emerged from the firefight unscathed, but U-1062 did not enjoy similar good fortune. Fessenden, one of Mission Bay's screen, homed in on sonobuoy indications on 30 September and sank the "Milch Cow" with a four-charge pattern. In the meantime, U-219 was not yet home free - one of Tripoli's Avengers dropped depth bombs on the fleeing boat on 2 October. American sonar-men felt that they had definitely "killed" the U-boat, but post-war accounting showed that U-219 had escaped to Batavia, Java.
When fuel supplies ran low, Tripoli returned to Recife on 12 October. She conducted one further search of the narrows from 26 October-12 November before heading for a much-needed overhaul at Norfolk. Subsequently, the escort carrier sailed for the Pacific and, after transiting the Panama Canal and touching at San Diego, arrived at Pearl Harbor on 10 January 1945.
Pacific
Tripoli transferred Composite Squadron 8 ashore to conduct operations from Hilo, Hawaii, before she loaded a miscellaneous cargo of fighters and bombers to be offloaded at Roi, in the Marshall Islands, where she made port on 20 February 1945. Returning to Pearl Harbor after this ferry run, the escort carrier commenced training operations which would continue through the end of the war, and into late 1945. With Japan's surrender and the end of hostilities in the Pacific, Tripoli was assigned to Operation Magic Carpet.
Arriving at San Diego on 29 August, with 500 Navy veterans, Tripoli returned to Pearl Harbor on 8 September, before resuming local operations - including night carrier qualifications - through November. She subsequently made one trip with Army passengers to San Pedro, California, and a further "Magic Carpet" run to San Diego. The carrier departed the west coast on 15 January 1946, for deactivation overhaul at Norfolk. On 22 May 1946, the need for her services not required, Tripoli was decommissioned and laid up in reserve.
United States
