This is the intermediate level certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for mixed gas diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for mixed gas diving on the ISC Megalodon CCR, utilizing a mixed gas diluent containing sixteen (16%) percent or greater oxygen, and to develop intermediate CCR diving skills appropriate to technical diving to a maximum of two hundred (200) fsw / sixty (60) msw.

Student Pre-Requisites
The student must:
. Be a minimum age of eighteen (18).
. Have a verified log of a minimum of fifty (50) rebreather hours distributed over a minimum of fifty (50) dives on the specific rebreather. Fifty (50) % deeper than sixty six (66) fsw / twenty (20) msw. All to be deeper than twenty (30) fsw / nine (9) msw. If the diver has fifty (50) hours on another CCR unit recognized by TDI, only twenty five (25) hours are required to be on the ISC Megalodon.
Have completed and qualified the TDI Air Diluent Rebreather Course or equivalent from agencies recognized by TDI.