| Few places even offer extended range now because it has largely fallen out of favour. Deep air diving is no longer considered big or clever or even useful.
BSAC Adv nitrox is to 50% isn't it? You may need to do a different adv nitrox course (i.e one that goes up to 100% O2) and a deco procedures course before you do the trimix but ERD is *not* necessary.
HTH |