A close-up view of the front of the mast of the USNS HIDDENSEE (185NS9201) showing the High Pole-B EW antenna and the Square Head IFF receiver on the back side. On the front is the Plank Shave missile targeting radar antenna. Atop the bridge is a Kivach 3 surface search radar antenna. The dome unit above that is the Bass Tilt gunfire control radar antenna which controls both the AK-176 and the AK-630 gun systems. The ship is moored at the Naval Sea Systems Command facility at Solomons Annex