 She returned to St. Nazaire on 23 July.Departing from St. Nazaire on 31 August 1941, "U-98" patrolled the waters west of the British Isles, and on 16 September fired four single torpedoes at Convoy SC 42 north-west of St. Kilda, sinking the British 4,392 ton "Jedmoor".She returned to St. Nazaire on 26 September.