DC Communications System

The following types of communications systems were used in shipboard damage control and firefighting operations throughout the last seventy-five years. Click photo to open item.

Battle telephone circuits	Auxiliary and supplementary circuits	Emergency sound-powered telephone circuits
Ship's-service telephones	Damage control announcing system (4MC)	General announcing system (1MC)
General Alarm	Collision Alarm	Chemical Alarm
Voice Tubes	Message Tubes	Messengers