Mk 101 Lulu

The Mark 101 Lulu was an airdropped nuclear depth charge developed by the United States Navy and the Atomic Energy Commission during the 1950s.

Neither the Lulu nor any other kind of nuclear antisubmarine or antiship weapon was ever used in combat by any country.

In RAF service for carriage by Shackleton MR2 and MR3 maritime patrol bombers it was known as Bomb, AS, 1200 lb, MC.

The Lulu lacked an important safety/arming device: it had no sensors to detect the freefall from an aircraft that would follow from the depth charge's being intentionally dropped.

As a result, if an armed Mk 101 bomb accidentally fell off an aircraft while it was parked on the deck of a warship, and then it rolled overboard, it would detonate at the preset depth.