Siandra is an Arthur Rob design, built by Ron Swanson of Sydney. She was launched in July 1956, and first competed in the 1956 Hobart Race to gain first place in second division and fifth in the fleet. 

Following many wins in offshore events she added to her record by winning the 1957 Montague Island Race.

This boat is used extensively for cruising by the owner, his wife and family and is yet invariably placed in the ocean races she enters. With the experience crew sailing her she will always have a chance of winning.