Quote:
| Originally Posted by Paul Oliver ERD is not about Deep Air, its managed decompression and self reliance along with Dive Planning, if the diver decides to dive Deep on Air thats their choice, and a lot of divers make that choice.
Deep is also relative  |
ERD as in 55m on air max depth,old TDI /IANTD course. I`m sure you know of it Paul. When I enquired re Normoxic Mix course , ERD was pushed onto the table instead. Needless to say,I turned it down. And of course, ERD can mean a 25m dive for 90 mins and resultant deco, but we all know it was sold as a 55m on air course.