A-A-59003, COMMERCIAL ITEM DESCRIPTION: AMPLIFIERS, AUDIO FREQUENCY; AND AMPLIFIER-CONTROL GROUPS - SHIPBOARD ANNOUNCING (31-MAY-1995] [SUPERSEDING MIL-A-21577A]

A-A-59003, COMMERCIAL ITEM DESCRIPTION: AMPLIFIERS, AUDIO FREQUENCY; AND AMPLIFIER-CONTROL GROUPS - SHIPBOARD ANNOUNCING (31-MAY-1995] [SUPERSEDING MIL-A-21577A]., This Commercial Item Description covers audio frequency amplifiers and controls, shipboard announcing type, for use aboard Naval Ships. The above amplifiers are to be employed as units in shipboard announcing systems which disseminate alarm signals, commands and information as required in the tactical, operation of Naval surface ships and submarines.