Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. When the Services Reconnaissance Department''s naval section was established in January 1944 it was equipped with only two vessels to transport special forces parties and their supplies behind Japanese lines. In order to make up this deficiency four trawler-type ships which were being built at Williamstown, Victoria for the Australian Army were transferred to SRD on 26 March 1944. The superstructure of these vessels was modified so that they appeared similar to the junks operated in the Singapore area. A further two vessels were later built at Fremantle, Western Australia and a fifth Williamstown-built ship was cancelled at the end of the war. While all six ships were commissioned into the RAN, their nine man crews were drawn from the Navy and other services.