On board the Type 81 general purpose frigate Eskimo (1961) in No. 3 basin in Chatham Dockyard during her 1971-1974 modernisation. The photographer is in the sonar control room between 41 and 42¾ stations on the starboard side of 1 deck looking to port and forward showing chairs for the consoles R, S and T on the left. The raised chair of the officer in charge is in the foreground. Against the port bulkhead are a speed and distance register, a junction box with a range and bearing unit above it, an extending desk with a cupboard and drawers below it, a Plessey Sippican unit, a power supply unit and a sonar control console. The main starter is against the forward bulkhead.