After further brief exercises in the Clyde in early May, "Trident" was ordered to Iceland to meet and escort convoy PQ16 to northern Russia. She was one of two submarines assigned to this duty, the other being HMS "Seawolf". This eventful patrol saw "Trident" pick up nine survivors from the American merchantman "Alamar" which had been abandoned due to air attack (and carry out orders to torpedo its remains) as well as try to fend off other air attacks using her anti-aircraft guns. The convoy underwent five days of air attacks from "Luftwaffe" aircraft as well a submarine attacks. Of the 35 ships which left Iceland, 8 were lost. After a short anti-U-boat patrol from Polyarnoe, in June 1942 "Trident" was tasked with providing cover to convoys QP 13 and PQ 17 in the Barents Sea and Norwegian Sea, before returning to the UK. In August 1942, Hezlet was mentioned in dispatches for his service in escorting these convoys.