Stan Tug 1606 "Rhumb Melba" The ‘Rhumb Melba’, a Damen Stan 1606 Tug, escorts the fishing boat ‘Challenge’ in Sydney harbour. Prior to this she was the lead tug in the Polaris salvage operation to re-float a vessel that had gone aground at Cronulla, just south of Sydney. This was her first job, and a great way to start her career.