A catamaran off Racha Yai Island, Phuket, Thailand

A catamaran off Racha Yai Island, Phuket, Thailand in August 2017

A catamaran in Wellington, New Zealand

A catamaran in Wellington, New Zealand in January 2017

A yacht and navy vessels at Huskisson, NSW

A yacht and navy vessels at Huskisson, NSW in September 2013

A cruise liner and the Sydney Harbour bridge at Circular Quay, Sydney

A cruise liner and the Sydney Harbour bridge at Circular Quay, Sydney in September 2013

Sunbathing couple

A couple sunbathing on an Ocean Spirit Cruises catamaran on the Great Barrier Reef, Queensland, June 2013

Fon on a catamaran

Fon on an Ocean Spirit Cruises catamaran on the Great Barrier Reef, Queensland, June 2013

Reef Rocket

A Green Island cruise catamaran at the Marina in Cairns, Queensland in June 2013

Reef Magic

The Reef Magic 2 cruise catamaran at the Marina in Cairns, Queensland in June 2013

Yachts in Strahan harbour

A yacht at Strahan harbour, Tasmania in May 2013

Catamaran in Strahan harbour

A catamaran in Strahan harbour, Tasmania in May 2013

Divers at Michaelmas Cay

Diving off Michaelmas Cay, Great Barrier Reef, off Cairns, Queensland in June 2013

Catamaran on the Great Barrier Reef

A catamaran at Michaelmas Cay, Great Barrier Reef, Cairns in June 2013

Catamaran

Catamaran Boat at Batemans Bay in July 2010

Catamaran

A catamaran at Fanny Bay in Darwin photographed in July 2008 with a rather portly man in front of it.