C-3074/Mic Control, Intercommunication Set from the nuclear fast attack submarine Greenling (SSN 614).
The C-3074/Mic Control, Intercommunication Set provides direct voice communication through a speaker or headphones.
Controls are limited to push to talk, volume and an unlabeled push button, perhaps an alert.
The headphone connector has 10 conductors suggesting that much or more control is available on the headset.
The unit is installed in the lower right of the main panel in the Ship Control Station where two operators guide the depth and course of the submarine.
See more panels from the USS Greenling (SSN-614)