MIL-S-17000/12, MILITARY SPECIFICATION SHEET: SWITCHING EQUIPMENT, COMBAT SYSTEM, COMMAND AND CONTROL, FIRE CONTROL AND INTERIOR COMMUNICATION SWITCHBOARD, SUBMARINE DECK-MOUNTED (PLUG CONNECTED) TYPE XII (2 MAY 1983)., The complete requirements for acquiring the switchboard described hereinshall consist of this document and the latest issue of MIL-S-170000.