The former Australian navy submarine HMAS Onslow is towed passed by the Sydney central business district skyline to a naval ship yard from the Maritime Museum in Sydney, Australia, Thursday, Oct. 16, 2008. The Oberon class submarine which was decommissioned in 1999 after its 30-year service is to undergo extensive preservation work and a complete survey to ensure the integrity of its hull during its four weeks at the Garden Island dockyard.