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Anti-Sub.

Low-Level

Carpet

Docks

Minelaying

Sub. Pens

Special

Raids On Special Targets

Bomber Command Executive Codeword: "GRAND SLAM"

Target Type: Submarine Pens, Underground Factories

1 x 22,000 lb deep penetration, spin-stabilized bomb containing approx. 11,000 lb of Torpex D. Carried only by Lancaster Mk. 1 (special) with bomb doors, mid-upper turret and much equipment discarded to limits aircraft weight.