The type 81 general purpose frigate HMS Zulu (1962) in No. 2 dry dock at Govan, Glasgow in December 1963 during the final stages of building. The photographer is looking to port from the starboard side of the keel blocks showing the hull outfit 19 (type 170) asdic between 18 and 24 stations in the keel. The protective dome has been removed, a man is pointing to the exposed sensor and a scale stick is alongside the sensor frame. Two wooden packing cases are on the floor of the dock.