Tec45

TecRec Course Technical-Diving-Philippines

Tec45 Course Outline

The Tec45 subcourse of the TecRec ‘Tech Deep’ program introduces Tec 40 divers to the first stages of full, technical deep decompression diving. Certified Tec45 divers are qualified to make multistop decompression dives that employ EANx and oxygen for accelerated decompression.

The expectation is that a Tec45 diver intends to continue on in technical diving. Accordingly, the course not only develops the knowledge and skills to make open circuit technical dives as deep as 45 metres/145 feet, but also begins developing the knowledge and skills the diver will need at the Tec50 level and beyond.

sidemount technical diving courses Philippines

Sidemount options available!

Perfect for -

  • Technical divers seeking extended bottom time up to 45m
  • Unlimited accelerated decompression, >100% O2
  • Use of a single decompression stage cylinder

Tec45 Course Content -

  • Knowledge Development
  • Practical Applications
  • 4x Open Water Dives (3 cylinders)

Tec45 Prerequisites -

  • Rescue Diver, with CPR/First Aid
  • Tec 40 Diver
  • 50 Logged Dives
  • 18 years or over
Tec45 Technical Diving Course Subic Bay


Course Duration

4 days* with classroom, practical workshops and 4 dives

Day 1 – Classroom theory, equipment workshop and practical applications
Day 2 – Skills training dives 1 – 2
Day 3 – Classroom theory, practical application and technical dive 3
Day 4 – Classroom theory, practical application and technical dive 4

*A 5 day program is recommended if you prefer a more relaxed training program or more time to refine skills.

Pre-study of course materials/completion of knowledge reviews can shorten the course duration. This is highly recommended. You may obtain your own copy of the TecRec ‘Tech Deep’ manual in advance, or I can email handouts/reviews.

The course is performance based, not time based. Performance requirements for each section must be satisfied to allow progression and certification.

Sidemount Tec45 course Philippines technical diving

Precision buoyancy and situational awareness are key training goals


Tec45 Training Dives -

Training Dive One

Environment: Confined water or limited open water
Depths: Minimum: 2.4 metres/8 feet
Maximum 10 metres/30 feet
Decompression: No stop only
Gases: Air or EANx
Ratios: 6:1

Training Dive Two

Environment: Open water
Depths: Minimum: 12 metres/40 feet
Maximum: 18 metres/60 feet
Decompression: No stop only
Gases: Air or EANx
Ratios: 4:1

Training Dive Three

Environment: Open Water
Depths: Minimum: 18 metres/60 feet
Maximum: 30 metres/100 feet
Decompression: No stop only
Gases: Air, Air, EANx or oxygen
Ratios: 4:1

Training Dive Four

Environment: Open Water
Depths: Minimum: 27 metres/90 feet
Maximum: 45 metres/145 feet
Decompression: Single gas decompression, gas switch for conservatism only
Gases: Air, EANx or oxygen
Ratios: 3:1


PADI TecRec Sidemount Tec45 Course Philippines

Correct protocols for the use of rich %O2 in accelerated decompression dives are a key focus of the Tec45 course

Tec45 Equipment Requirements

  • Double cylinders of at least 12 l/70 cf each, with isolator manifold.
  • The isolator manifold is not required for divers using sidemount configuration.
  • Primary and secondary regulators for back mounted double manifolds, one
  • with two metre/seven foot hose for air sharing and one with SPG. Note: In sidemount configuration, one regulator must have the two metre/seven foot hose, and both regulators must have an SPG.
  • 1x Stage/decompression cylinder with regulator and SPG, with proper labels/markings.
  • Tec diving BCD(s) and harness (backmount or sidemount)
  • Two multigas enriched air capable dive computers, or one multigas enriched
  • air computer and a back up single gas computer with dive tables, or one single gas enriched air computer and a backup timer and depth gauge with dive tables.
  • Exposure suit appropriate for environment and dive duration
  • Weight system (if needed). Note: Students and staff should weight for the contingency of decompressing with near-empty primary cylinders and empty or absent stage/deco cylinders.
  • Jon line (as needed for environment)
  • Inflatable signal tube, whistle and/or other visual and audible surface signaling devices. Note that a sausage type DSMB may double for the inflatable signal tube.
  • Reel and lift bag (bright yellow preferred) or DSMB. A suitable DSMB has sufficient buoyancy to help steady a diver during a drifting decompression, and is unlikely to spill when deployed from the underwater.
  • Knife/cutting device and back up
  • Slate or Wetnotes
  • Back up mask (optional)
  • Compass
  • Lights (optional – as required for dive environment)
  • Backup buoyancy control – the student must have a reliable means for controlling buoyancy and maintaining decompression stops in mid-water with a failed primary BCD. This is usually accomplished with a backup BCD (double wings)
Tec45 Course Sidemount Philippines

Assessment of Technical Dive Training Readiness

In preparation for the course and before beginning open water dive training, there will be an informal assessment of the potential student’s skills and comfort level in water, along with a general assessment dive knowledge. If the potential student appears to lack dive readiness appropriate for the training level, remedial training will be offered before training progresses.

Contact me to discuss your training requirements.

Read/Download PDF Tech Courses Brochure

Sidemount Technical Wreck Course-Flow-Diagram