DRS Pivotal Powers 1500 VA Tactical Uninterruptible Power Supply (UPS) is intended for use on board naval ships to provide conditioned backup power to command, control, communication and navigation equipment where a clean, reliable power supply is essential. The tactical UPS provides 115 VAC, 60 Hz single-phase high quality output power using the ships Type 1, 115 VAC supply conforming to MILSTD-1399.