Jewell served on
HMS Osiris and
HMS Otway, and in November 1940 joined
HMS Truant commanded by Lt-Cdr Haggard. Haggard was constantly seeking the enemy and was something of a mentor to Jewell. On one occasion Haggard disobeyed orders not to approach within 15 miles (24 km) of
Tripoli but in fact penetrated a dense
minefield by following an Italian minelayer. Six months later he led battleships of the
Mediterranean Fleet through the same minefield to bombard Tripoli. On 27 May 1942, Jewell took command of
Seraph and its 44-man crew, little realising what part it would play in naval history.
Seraph was chosen to take the American General
Mark Clark and his staff to talks with
Vichy French officers in
Algeria. This was known as
Operation Flagpole (World War II). On 19 October Jewell landed Clark's party in small collapsible canoes about 50 miles (80 km) west of
Algiers, with three members of the British
Special Boat Section paddling them in.
Seraph spent a day lying submerged in deep water. After dark, Jewell took her in until there was less than 10 ft (3 m) of water under the keel. The sea was too rough to recover the boats from the beach; so Jewell took
Seraph in until she was almost aground. Clark and his party then dashed for the boats, paddled hard through the surf, and were hauled on board;
Seraph reached
Gibraltar on 25 October. ==Operation Mincemeat==