SS South Steyne, Heritage steam ferry in Sydney Harbour, Australia.

The SS South Steyne is a double-ended, double-screw steamship with a riveted steel hull, a steel superstructure rising to sun deck level, teak decks and wheelhouses, and eight watertight bulkheads. It is 67.23 metres long with a beam of 11.76 metres and a gross tonnage of 1,203. Two funnels are fitted, one of them a dummy containing a water tank.

The vessel was built in 1938 by Scottish shipbuilder Henry Robb and served as a steam ferry for Sydney Harbour crossings until 1974. It underwent regular maintenance and updates during its working life to remain safe and efficient.

The name comes from the promenade behind Manly's ocean beach. During World War II the ferry's white sections were painted dark green so it would not be seen at night. From 1953 it ran Sunday ocean cruises to Broken Bay and followed the start of the Sydney to Hobart yacht race.

The vessel is currently housed at Berrys Bay where ongoing maintenance work takes place and public visits are not possible at this time. It helps to check in advance whether viewing opportunities or guided visits through preservation groups might be available.

South Steyne's two funnels are not identical: the second is a dummy that houses a water tank. Her boilers were built to burn coal or oil, but she ran on oil throughout her career. In 1953 she was certified to cruise within 26 nautical miles of Sydney Harbour and ran Sunday ocean trips to Broken Bay.