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If Kelvin Davis were a cat, he reckons he have gone through four of his allotted nine lives.
He spent thirteen years in the New Zealand Navy, including as a medic during the Vietnam War and later as a Navy diver.
He's written a memoir called Nine Lives of a Soldier and Sailor that explores his incredible experiences: how he was the de facto postie during tours to Scott Base, his near court-martial over a New Year's Eve concoction and a close call running out of air while assembling underwater pipes for the Marsden B power station.
But much of the book is focused on the gruelling work he did in Vietnam - and it's been aided by his extensive diaries and photos he took at the time.
One of the nine lives he lost, was an ambush on Thanksgiving 1968 in which he and three US soldiers were injured.
Kelvin's spent nearly 40 years trying to track down the trio he knew only by their surnames - and he hopes this book might afford one last chance to find them.