My first Flight Engineeer actually had been one of the first to land at Gan (the lagoon) in a Catalina, taking in part of a surveying team. At the same time the island had been misplotted when first surveyed, and our Nav (a certain Fr... Ea...) spent a couple of days proving it with the sextant, in the days before GPS etc. It had been plotted as being North of the Equator during the war, but is actually slightly South.