Tek Cave Diver 2 (Trimix)

The follow-on to Tek Cave Diver 1, this course extends students’ range to depths beyond 45 m/150 ft by using Trimix. Prior training in technical cave diving and the use of Trimix is required.

Due to the depths involved, students in this course will likely have the opportunity to visit sites the average cave diver seldoms sees — and often doesn’t even know exist. It’s truly a course for the “best of the best.”


Prerequisites for this program include, but are not limited to:

  • Be at least 18 years of age.
  • Be able to unequivocally answer No to all questions on the RSTC Medical History/Exam form (or equivalent) or have obtained a physician’s approval for diving within twelve monts of the start of training, and have had no significant changes in health or medical condition since.
  • Be certified to the NASE Tek Cave Diver 1 level (or equivalent).
  • Be certified in the use of Trimix.

Time Frames

This program generally requires:

  • Two days.
  • At least 60 minutes of bottom time.


Course Fees

Few things are more frustrating than seeing a “one size fits all” course price, only to discover your specific situation may require you to incur additional costs. We work hard to keep course fees realistic and competitive. Nevertheless, fees may vary from one individual to the next depending on factors such as:

  • Group size
  • Your prior training and experience
  • Any courses you may be taking concurrently with this one
  • Additional time needed to accommodate special needs

We can give you a more accurate estimate of total course cost once we know more about you. Use the form at the bottom of the page to tell us more about your specific situation. We will get back to you with up-to-date pricing information.

You should be aware that course fees cover all instruction, NASE training materials, if available, and NASE certification, if earned. Students are responsible for:

  • All personal dive equipment.
  • All gas fills.
  • Transportation to and from dive sites.
  • Dive site admission fees.
  • Accommodations.
  • Any non-NASE training materials.
  • Any non-NASE certification card processing.

Depending on the course, additional certifications may be available from organizations such as IANTD and NSS-CDS. If desired, students must pay for the cost of these agencies’ certification cards. These organizations will also expect you to buy a copy of their student manual, if available — even though you may not use it in the course.

Required Equipment

Be sure to consult this page for the list and description of the equipment you will need to take this course.

Take the Next Step

Use this form to ask questions or begin the enrollment process. If enrolling in a course, be sure to include a brief summary of your prior training and experience.