The Navy’s description of this photo from the Naval Air Gunners School in Hollywood, Florida:
‘Telephone girls’ at a deadly switchboard wear head-phones hooking them to their pupils as the tell the latter the ‘wrong numbers’ they get in firing at targets on the high-speed range. The turrets are identical to the ones the future gunners will occupy on warplanes.
The photo comes from the National Archives.
Hinges of History 