The submarine carried Mark Clark, other senior American officers, Special Boat Section personnel, collapsible canoes, radios, weapons, supplies, and even diplomatic comforts to the Algerian coast. Their mission was to meet Vichy French representatives before the Allied landings in North Africa. Seraph waited through delays and recovered the party on 25 October 1942. The uneventful return to Gibraltar shortly before Operation Torch confirmed that an S-class boat could handle a clandestine passenger mission.
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Seraph carries Allied negotiators in Operation Flagpole
Operation Flagpole used HMS Seraph to land senior American officers secretly in Algeria for talks with Vichy French representatives.