XR Training Standards and Procedures

XR Overhead Programs

Technical Wreck Diving

Intent

This program provides divers with the training necessary to:
  • Independently plan and conduct full wreck penetration dives,
  • Using specialized equipment,
  • Using the Rule of Thirds concept of gas management,
  • To depths within the diver’s current certification,
  • With an equally- or more-qualified dive buddy.

Minimum Instructor Rating

An active status Technical Wreck Diving Instructor may conduct the Technical Wreck Diving program.
Equipment Configurations
  • They may use a Twinset Total Diving System as outlined in the SSI Training Standards if they have the Extended Range Instructor (Twinset) certification.
  • They may use an Extended Range Sidemount Total Diving System as outlined in the SSI Training Standards if they have the Extended Range Sidemount Instructor certification.
  • They may use an XR CCR or XR SCR Total Diving system as outlined in the SSI Training Standards if they have the applicable CCR or SCR Extended Range Instructor certification and the CCR or SCR Diving certification on the unit used by the student.

Note | The SSI Professional teaching the program must have an instructor certification in the equipment configuration used by the student.

Student Prerequisites

Have logged at least:
  • 75 total dives.
Have at least one (1) of the following SSI certifications or an equivalent from a recognized training agency:
  • Extended Range Wreck Diving
  • Extended Range Cavern Diving
For students using a twinset configuration (in addition to the above):
Have the following SSI certifications or an equivalent from a recognized training agency:
  • Extended Range
For students using a sidemount configuration (in addition to the above):
Have the following SSI certifications or an equivalent from a recognized training agency:
  • Extended Range Sidemount
For students using a CCR unit (in addition to the above):
Have logged at least:
  • 100 hours on the applicable unit.
Have the following SSI certifications or an equivalent from a recognized training agency:
  • CCR Extended Range | Must be on the same unit that is used for this program.
For students using an SCR unit (in addition to the above):
Have logged at least:
  • 100 hours on the applicable unit.
Have the following SSI certifications or an equivalent from a recognized training agency:
  • SCR Extended Range | Must be on the same unit that is used for this program.

Duration

  • Recommended hours for completion: 20.

Minimum Equipment

Students participating in this program must use at least one of the following equipment configurations:
  • A complete Twinset Total Diving System.
  • A complete Extended Range Sidemount Total Diving System.
  • A complete XR CCR Total Diving System.
  • A complete XR SCR Total Diving System.
And
  • A suitable primary light and a minimum of two back-up lights.
  • Three (3) reels or spools per diver (one should be a safety spool with a minimum of 45 meters of line).
  • One primary line reel per team.
  • Three (3) line arrows and three (3) non-directional cookies, or six (6) referencing exit markers (REM).

In-Water Ratios

  • The student-to-instructor ratio is 3:1.

Depth Limitations

  • Maximum pool/confined water depth limit: 12 meters.
  • Maximum depth limit for Overhead Training Dives 1 and 2: 40 meters.
  • Maximum depth limit for Overhead Training Dives 3 through 6: The maximum certification depth of the instructor or student, whichever is shallower.

Requirements For Completion

  • Complete all academic sessions and assessments as outlined in the instructor manual for Technical Wreck Diving.
  • Complete the program’s final exam.
  • Complete the XR Water Fitness Evaluation as outlined in the SSI General Training Standards.
  • Complete at least one (1) dry land skill development session as outlined in the instructor manual for Technical Wreck Diving.
  • Complete at least one (1) pool/confined water skill development session lasting at least one (1) hour as outlined in the instructor manual for Technical Wreck Diving.
  • Complete at least six (6) overhead training dives as outlined in the instructor manual for Technical Wreck Diving.
  • Complete at least 180 minutes of runtime in the overhead environment.

Training Conditions

Breathing Gas and Decompression

  • All overhead training dives must be planned within the decompression limits of the student’s certification.

Open circuit

  • No penetration may exceed one-third of the diver’s bottom gas supply.
  • Gas matching formulas must be used and applied to the dive plan.

CCR

  • CCR bailout cylinders must have enough gas for the diver to return to the surface from the deepest planned penetration point, based on a SAC rate of 40 liters per minute for the duration of the first bailout gas.
  • The remainder of the dive can be planned at the divers calculated SAC rate.
  • Bailout can be planned using all of the available gas.

SCR

  • SCR cylinders must have enough gas for the diver to return to the surface from the deepest planned penetration point, based on a SAC rate of 40 liters per minute for the duration of the first bailout gas plus an additional 30 liters per minute in SCR failure mode.
  • The remainder of the dive can be planned at the divers calculated SAC rate plus an additional 30 liters per minute in SCR failure mode.
  • Bailout can be planned using all of the available gas.

Environment

  • All overhead-specific skills must be conducted in an overhead environment as outlined in the program’s instructor manual.
  • All overhead training dives must be conducted in water with at least five (5) meters of visibility at the start of the dive.

Navigation

  • A guideline to open water must be maintained during all phases of any overhead training dive.
  • Complex navigation patterns including jumps, circuits and other multiple line navigational systems are permitted.
  • Minor restrictions are permitted, as defined in the SSI General Training Standards.
  • Dives must be completed on at least two (2) different sites unless the site is large enough to have multiple entry and exit points and interior routes.

Sequence

  • The pool/confined water skill development session may only be conducted after the student successfully completes the equipment configuration session and the dry land skill development session.
  • Overhead Training Dives 1 through 4 may only be conducted after the student successfully completes the XR Water Fitness Evaluation, and all pool/confined water skill development sessions.
  • Overhead Training Dives 5 and 6 may only be conducted after the student successfully completes all academic sessions and Overhead Training Dives 1 through 4.

Certification

Upon completion of all academic and in-water requirements, the SSI Professional may issue the program’s digital certification card.
The SSI Technical Wreck Diving certification entitles the holder to dive autonomously:
  • In environments similar to those of the diver’s training and experience,
  • Using specialized equipment,
  • Using the Rule of Thirds concept of gas management,
  • To their maximum certification depth,
  • With an equally- or more-qualified dive buddy.

Credit

If combined with the Technical Extended Range program:
  • Overhead Training Dives 1 through 4 of the Technical Wreck Diving program may also be used to meet the requirements of Open Water Training Dives 1 through 4 of the Technical Extended Range program.
  • Divers must complete all of the prerequisites, skills development and academic requirements for both programs.
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