Bouncing bomb
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A bouncing bomb is a bomb designed to bounce to a target across water in a calculated manner to avoid obstacles such as torpedo nets, and to allow both the bomb's speed on arrival at the target and the timing of its detonation to be... Wikipedia
Designed: April 1942
Detonation mechanism: hydrostatic fuze (depth of 30 feet (9.1 m)) with backup chemical time fuze
Effective firing range: 400–500 yd (370–460 m)
Manufacturer: Vickers-Armstrongs
Mass: 9,250 lb (4,200 kg)
Muzzle velocity: 240–250 mph (390–400 km/h); 500 rpm back-spin
No. built: 120 (62 inert and 58 HE filled); 19 used operationally