A superstructure mock-up of an Australian Battle class destroyer in the Mould Loft, Portsmouth Dockyard, Hampshire.

A wooden mock-up of part of the "Y" office on the signal deck of an Australian Battle class destroyer erected in the Mould Loft of Portsmouth Dockyard. The equipment includes four receiver outfits, a steel safe, a steel cupboard, a jack board, a clock, a morse key and two ossillators. Vertical format.