I recently did two 2 tank dives with Top Dive in Fakarava and Bora Bora, French Polynesia, on a Windstar cruise dive excursion, and experienced an unusual approach to the use of Nitrox. We were on a dive boat with eight divers, with me being the only Nitrox certified diver in the group, and was surprised when the DM/Instructor briefed that everyone would be using Nitrox for the dives. A very brief explanation of how Nitrox differed from air was given, and with the explanation they always used Nitrox because of the distance to a chamber. I was not overly concerned by their procedure because the dive profiles being briefed would not approach NDLs for air or O2 toxicity for Nitrox with a 35 and 32 setting. Obviously I set my computer for the Nitrox, and all the other divers were given wrist computers, but it was obvious none of the other divers had a clue about using the computer. In addition, because of the way Nitrox was briefed, the other divers were left with the impression Top Dive was going to give them a Nitrox cert after the dives, but I quickly assured them that was not going to be the case, and it was obviously an in house procedure for their dive op. Maybe this is common in that part of the world, but when diving with Paul Gauguin a couple years ago, and with Hemisphere Sub at Raiatea on this trip, air was standard issue, unless the diver was certified for Nitrox and requested it. This is just info for those planning on using Top Dive in Polynesia.