By 1941, she had been fitted with Radar Type 291 air warning at the masthead, Radar Type 285 on the high-angle HACS Director Control Tower on the foremast spotting top and Radar Type 272 centimetric target indication on the foremast, below the spotting top. By 1944, nine 20 mm Oerlikon guns had been added, two of which had replaced the useless Vickers machine guns. Adventure was converted to a repair ship for landing craft for the Normandy landings.
