Avatar sequel character named after John Garvin, who supervised film cast and crew's safety under water

Film lovers around the world have been waiting for 13 long years to see Avatar: The Way of Water, the sequel to the highest-grossing movie of all time.  

But one particular man in regional Victoria has been holding his breath for the film's release.

John Garvin, who lives in the tiny north-east Victorian town of Yackandandah, was the supervising master diver for the production.