On board the type 81 general purpose frigate HMS Tartar (1960) in Portsmouth Dockyard between November 1973 and April 1974 during a refit. The photographer is in the sonar control room between 41 and 43 stations on the starboard side of 1 deck looking to starboard and aft from forward showing the range and depth consoles and an asdic type 170B control unit against the ship's side. A resistor box, a main starter, a range retransmission unit, a training retransmission unit, an automatic emergency lantern, a fire extinguisher and a clock reading 2.48 are against the aft bulkhead. A vertical format negative.