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 a steel cupboard, voicepipes, a receiver outfit, a telephone to the H/F D/F office and an A/C supply switch. Vertical format.