NAVY MIL-STD-1399-390-1987 INTERFACE STANDARD FOR SHIPBOARD SYSTEMS SECTION 390 ELECTRIC POWER, DIRECT CURRENT, (OTHER THAN SHIP'S BATTERY) FOR SUBMARINES (METRIC)
This standard defines and establishes interface requirements for submarine equipments utilizing dc electric power from sources other than the main storage battery to ensure compatibility between such user equipments and the power system, and between individual user equipments. It defines the submarine electric power system characteristics, requires that user equipments be designed to operate from power systems with these characteristics, and restricts any adverse effect of any user equipments on the power system. This standard does not apply to, nor shall it be used for, the design of ship service dc power system loads connected to the main storage battery.