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Trimix Class

January 11 @ 8:00 am - January 12 @ 5:00 pm


After taking the Trimix Class graduates are able to make dives requiring long decompression stops and needing expedition quality contingency plans. They are comfortable making advanced equipment selection and know how to configure and manage additional gear to function well on long dives in local conditions. This gear will include two sling / stage cylinders containing decompression gases. They also fully understand water behaviors dictated by use of helium in breathing mixes; are competent using complex gas management calculations and have the ability to create, manage and modify complex decompression schedules and apply them as appropriate to the dive conditions. Graduates should also be familiar with the correct procedures for using a helium / oxygen analyzer to test mixes.

This is a two day class and consists of 4 dives.

Prerequisites for this course are:

  • 18 years old.
  • Advanced Nitrox / Decompression certified (or equivalent).
  • 100 logged dives.

The following equipment is recommended to bring to the Trimix class. Hoodsport’N Dive carries this specialized equipment and is happy to help you purchase the equipment at a fair and reasonable price. It is STRONGLY advised that all Trimix students own their technical dive gear at this stage of training.  If you do not have the equipment needed it will be provided free of charge during the class.

These items are available at Hoodsport ‘N Dive and make sure to ask about our 10% discount offered to any student taking a technical class from Hoodsport ‘N Dive!

  • Dual Cylinders (with regulators)
  • 2 Stage Bottles (at least 40 cubic ft) w/regulators
  • Argon Setup
  • 50lb Lift bag with dump
  • Primary and Backup Light System
  • Dive Reel
  • 7ft Primary Regulator Hose
  • Back-up Mask
  • 2 Dive Computers

Cost: $1100 – The price includes: all books and course material, registration, and diving gases.


January 11 @ 8:00 am
January 12 @ 5:00 pm
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Yellow House / HSND
23891 N US HIGHWAY 101
HOODSPORT, WA 98548 United States
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