Fiskerton FIDO

As the long winter nights approached, they brought along adverse weather. Crews, exhausted after hours of flying in severe icing conditions, battling through flak, searchlights and night fighters would often return over England to yet another enemy, equally as dangerous but this time a natural one... fog.

The 'boffins' came up with an answer to this problem which was given the title:

Fog Investigation Dispersal Operation, or FIDO for short.