AJ-G THE DAMBUSTERS  (617 Squadron)

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Codewords

A code system was devised in order to relay messages back to Harris, Cochrane and Wallis at 5 group operations room at Grantham.

A release of Upkeep would be signalled by the prefix Goner followed by a number indicating what had happened after the release of the weapon.

Goner 1 failed to explode
Goner 2 overshot dam
Goner 3 exploded more than 100 yards from dam
Goner 4 exploded 100 yards from dam
Goner 5 exploded 50 yards from dam
Goner 6 exploded 5 yards from dam
Goner 7 exploded on contact with dam
Goner 8 no breach made
Goner 9 small breach made in dam
Goner 10 large breach made in dam

After Goner and the appropriate number, a letter was added to signify which dam had been attcked:

A = Mohne
B = Eder
C = Sorpe
D = Lister
E = Ennepe
F = Diemel

For example: a message Goner 79A would mean: weapon released at the Mohne dam, exploded on contact with the dam and caused a small breach.

NIGGER - indicated a breach in the Mohne dam and instructed the remaining aircraft with mines to attack the Eder dam.

DINGHY - indicated a breach in the Eder dam and instructed the remaining aircraft with mines to attack the Sorpe dam.


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