This was the master gun sight, which controlled all 3 of the 3" guns on the ship.
(photo courtesy of Don F. Roban)

Crewmembers practice firing one of the 40 mm guns at a floating boat target.
(photo courtesy of Don F. Roban)

Crewmembers firing one of the 20 mm guns at a windsock being towed behind an airplane.
(photo courtesy of Don F. Roban)

Yoeman 1/c Hugh Morgan at a fire control station.
Because he is the "talker" for his general quarters station, he is wearing an oversized helmet that contains a headset and microphone so that he can relay orders and information between the CIC (Combat Information Center) and the others at his station.