Graeme Rodgers sent this article he found from Marine News Volume XXXV No 4. April 1981 

The Royal New Zealand Navy has awarded a contract to Vosper Thornycroft for technical aid covering the extension-of-life conversion of the Type 12 Rothesay class frigate Taranaki. This contract, worth approximately £20 million, involves the design for the major conversion from steam to gas turbine propulsion.

Full details F148Thornycroft.pdf (35.78 KB)