The dredge windlass and its motor are mounted amidships, between the mast and deckhouse. The tumblehome hull and composite deckhouse reduce radar return. This required relocating one 5 inch/38 caliber gun to the aft deckhouse. A large deckhouse was built on the shelter deck between the funnels. The composite deckhouse encloses much of the sensors and electronics. It has sitting headroom under the small deckhouse. The fifth mount was positioned on top of the rear deckhouse. The fifth gun was carried on top of the rear deckhouse. The plane slammed into the after deckhouse. SPY-1D was first installed on in 1991, with all antenna in a single deckhouse. "Auklet" suffered significant damage to her deckhouse. The after deckhouse was extended to contain a mortar handling room. These were fitted to the top of the after deckhouse.