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It took him more than a decade - but earlier this year Simon Olliver achieved the incredible feat of becoming the oldest person to complete the gruelling Oceans Seven swim.
He's also one of just 41 people to have managed it - and the third New Zealander after Kimberley Chambers and Caitlin O'Reilly - who's the youngest Oceans Seven finisher.
The Oceans Seven is a marathon swimming challenge across seven channels: The English, North, Molokai and Catalina Channels and the Tsugaru, Gibraltar and Cook straits. Simon swum Cook Strait back in 2014 and on his third attempt swimming the 45 kilometre Molokai Channel in Hawaii in August - also known as the Channel of Bones - he entered into the record books.
Simon is the president of the Canterbury Open Water Swimming Association and joins Kathryn to talk about the challenge.
