'Robin' (i) was a British undertaking by divers operating from the salvage vessel Tedworth, escorted by the sloop Puffin, to attempt the salvage of encryption-related data and equipment from U-13 (23 June 1940).

Under the command of Kapitänleutnant Max-Martin Schulte, this small coastal U-boat had been sunk on 31 May in the North Sea about 11 miles (17.75 km) to the south-east of Lowestoft by the depth charges from the British sloop Weston. All 26 members of the U-boat’s crew survived.