​​Southern Maryland Divers, llc 

When is the class offered?

Due to low student to instructor ratios for this class, it is only taught on demand and not scheduled routinely. Please contact us so we can work on a schedule that works for you.

Maryland's premier technical dive shop

Tec Trimix 65 course topics include:

  • Trimix diving depth ranges
  • Exposure planning
  • Selecting a mix
  • Argon inflation systems
  • Handling three or four decompression cylinders
  • Decompression models
  • Emergency procedures
  • Decompression software and multi-gas computers

you'll learn to

Course cost includes instruction and certification card upon successful completion. Students are responsible for required course materials, all gear, boat charter fees, gasses, quarry entry fees, and travel and rental fees associated with the class.


You’re qualified to enroll in the Tec Trimix 65 course, if you:

Are a 
PADI Tec 50 diver
Have a minimum of 100 logged dives
Are at least 18 years old
Have a 
Medical Statement signed by a physician within the last 12 months

Note that qualifying certifications from other diver training organizations may apply – ask your Tec Trimix Instructor.

Questions about the PADI Tec Trimix 65 class, or technical diving in general? 
Contact us!


If you’re into technical diving then you know that to extend your depth range you need to use trimix – a blend of helium, oxygen and nitrogen. The Tec Trimix 65 course introduces you to using trimix down to a maximum depth of 65 metres/210 feet. There are advantages to using three gases, but you need to know how to do it right. Earning the Tec Trimix 65 certification makes deeper exploration a reality.

Course description

You’ll use full technical equipment and you may use a technical sidemount configuration, plus two stage/decompression cylinders. Your Tec Trimix Instructor may suggest other equipment.

Southern Maryland Divers can provide you with all the gear requirements needed for this course via rentals, or gear purchases. 

Gear Requirements for this course can be found 

Please contact us about gear requirements as we offer discounts to our students on gear purchases. 

The scuba gear you'll use

Extend your depth range the right way with a blend of helium, oxygen & nitrogen (trimix). The Tec Trimix 65 course introduces you to using trimix down to a maximum depth of 65 metres/210 feet.

PADI Tec trimix 65 Course