Who Are We?

The instructors that offer training through Choptima.com on the Dive Chest Mount CCR are some of the best technical diving educators in the world. They have a vast amount of experience in all facets of technical diving and have taught hundreds of rebreather divers at all levels, from initial user level courses, to advanced courses, and instructor level programs. Several have been involved with the CM O2ptima from the beginning with testing the pre-production models. In addition to their experience on the Dive Rite O2ptima CM they are all full-time dive professionals that seek the most cutting-edge information and training techniques.

Selecting the correct instructor is one of the singular most important decisions you can make after you decide this is the rebreather for you. We have attempted to make it is easy as possible. Click on the instructors below to learn more about them!


Our ITs still love teaching all levels of O2ptima CM courses not just instructor courses

Marc Crane

Marc Crane

Primary Training Locations:
Bali | Southeast Asia

Primary Training Locations:
Florida | Mexico | Arizona | California | Travel Worldwide

Meet Our Instructors

Primary Training Locations:

Primary Training Locations
Mexico City | Baja | Playa Del Carmen | Mexico | Florida | Travel Worldwide

Primary Training Locations:
California | Curacao | Cayman Islands | Travel Worldwide

Primary Training Locations:

Primary Training Locations:
Arizona | Sonora – Mexico


All of the instructors listed on choptima.com are independent dive professionals and therefore charge accordingly and differently for their services. Once you have found the information you need please reach out to the instructor of your choice directly for detailed pricing and what is/is not included in the courses they run. With technical diving you get what you pay for and a substandard course will cost you way more in the long run!


Are you a CM Instructor that is interested in joining Choptima.com as an affiliate instructor? Reach out to learn more!