If you are interested in Tec Diving start here.
Tec 40 is the first sub division in the PADI Tec Deep Course, and it consists of four dives.
On this course you will learn to use decompression software and dive computers to make decompression dives with no more than 10 minutes deco, and not deeper than 40 metres. You will also learn how to use a side slung cylinder, with no more than 50% oxygen to add extra conservatism to your deco stops.
For this course you will use the Tec deep diver crewpack which will introduce you to Tec lingo, emergency procedures, gas planning and decompression and stage cylinder handling.
This crewpack will be used for the entire Tec deep diver course, so it will also see you through Tec 45 and Tec 50 too.