The third part of the PADI Tec Deep Diver program is the Tec  50 course. as a tec  50 divers you show that you have developed competence as a tec diver and have the skills up to a maximum of 50  yards / 165  to dive foot. You know how to do extended, accelerated decompression stops with up to two breathing gases. Reaching this level is not easy, but upon reaching your Tec  50 certifications open the doors to deeper diving expeditions.
 
 Note that qualifying certification cards (diving credentials) may be recognized by other diver training organizations - please check with your Tec Deep Instructor.