A wooden mock-up of a compartment in a Royal Navy destroyer constructed in a shipyard workshop. The ship is possibly a Weapon class vessel and this may be the operations room on the signal deck. Identified objects include a gun direction Type P.M. junction box, a switch socket for a portable hand lamp, a switch unit 44, a board supply box, a plot for tote board and a T.I.U. 2B.F. close range unit.