Recollect on a day off on Gan:
Nav 1: "Hey, Bas, I'm going snorkelling to film sharks, do you want to come?"
Bas: "Well, er, SNORKELLING with sharks, not SCUBA you say."
Nav1: "Well, Nav 2 is going!"
Bas: "Oh, well, OK."
Shortly afterwards heard from along corridor: "Well, Bas is going!"
Later:
Find shark - formation dive with Nav 1 filming - shark flicks off into the deep blue.
On surface Nav 2 (sensibly) says he's had enough and is RTB whilst Nav 1 & Bas remain.
Subsequently heard that, on way back, Nav 2 saw fish head looking out of hole in coral and dived towards it. 'Fish' came out to greet Nav 2 followed by very long body. Nav 2 had met his first Moray
