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Douglas Protractor
Aircraft & Exhibits, London, Hangar One, 70/I/458
This square protractor has its origins in marine navigation but has proved equally useful for use with aeronautical charts as nautical ones.
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- AM Sir Frederick Beresford (Freddie) Sowrey
- 615 Squadron (RAF) [1]
- British Broadcasting Corporation [1]
- Gp Capt Arthur Hay Donaldson [1]
- Gp Capt Frederick (Fred) Sowrey [1]
- Royal Air Force [1]
- Royal Auxiliary Air Force (1947- ) [1]
- Royal Naval Air Service [1]
- Sir Winston Leonard Spencer Churchill [1]
- Sowrey Family [1]