PADI TecRec

Tec 45

Continuing Education
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About The Course

This is a course where you rise to the challenge and commit to becoming a technical diver. The PADI Tec 45 course extends your depth limit to 45 metres/150 feet. You will learn to plan and execute single and repetitive decompression dives using a single decompression cylinder with up to 100 percent oxygen. You will use double cylinders, which can be either back mount or sidemount diving configuration. Tec 45 is a prerequisite to Tec 50. There is also an option for divers to earn a Tec 45 Trimix Diver certification

What You Will Learn

Your Tec 45 training consists of seven knowledge development sections, four practical application sessions and four open water dives. Building on what you learned in the Tec 40 course, you will focus on additional techniques, procedures, and emergency skills. You will learn more advanced decompression, gas planning, decompression models, and fine-tune your thinking like a technical diver. Tec 45 Trimix students will also learn about diving trimix.

Tec 45 Trimix (option)

Curious about the benefits of using Trimix gas, like decreased gas density and reduced narcosis? Tec 45 divers can also learn to use trimix with not less than 21 percent oxygen and not more than 35 percent helium.

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More Information

To enroll in the Tec 45 course, you must meet these qualifications:

  • PADI Tec 40 Diver 
  • PADI Rescue Diver* 
  • Minimum of 50 logged dives, with at least 10 dives deeper than 30 meters/100 feet
  • 18 years old 

* If meeting this with a qualifying certification, provide proof of CPR/First Aid training within the previous two years..  

Technical diving requires a minimum level of health and fitness.

You will need to have a Diver Medical form signed by a physician.​

If you (or your physician) have questions about medical fitness to dive, contact the experts at Divers Alert Network (DAN).

  • Primary mask and backup mask - Although any scuba mask is adequate, tec divers prefer compact masks for minimum resistance in the water. A backup mask is carried in a pocket in case of loss or damage to the primary mask.
  • Fins - Tec divers often use dry suits, requiring large style, open-heel adjustable fins.
  • Wing-typed BCD and harness - A high capacity BCD with a backup gas bladder mounts between the harness and cylinder. The backup bladder is required because a tec diver may be too heavy to swim to the surface if the main BCD fails. The harness is a shoulder, waist and crotch strap assembly that holds tanks to the tec diver’s back, with D-rings mounted on the shoulders and at the waist for clipping equipment.
  • Primary and secondary regulator - The primary regulator has a two-metre/seven-foot hose for sharing gas with a teammate in an emergency. The secondary regulator is independent for use in case of malfunction in the primary regulator. The secondary is also used when sharing gas with a teammate via the primary regulator.
  • Twin cylinders, decompression cylinders/stage bottles - High-capacity cylinders hold high-pressure compressed air, enriched air or trimix depending upon dive requirements. An independent decompression cylinder and regulator is clipped to a harness on the side. Extra tanks are used to extend dive time and/or to carry a gas for optimizing decompression. Often, two cylinders are carried.
  • Multigas dive computers and submersible pressure gauge (SPG) - Dive computers, one primary and one backup, track and display decompression requirements, and allow tec divers to switch to different kinds of gas blends to optimize decompression. If not integrated into the dive computers, SPGs constantly display how much air remains in the cylinders.
  • Dry suit - Provides insulation for a comfortable dive over a long duration.
  • Other equipment - Compass, slate, delayed surface marker buoy (DSMB), emergency signaling devices, backup dive tables, Z-knife, shears, safety reel, and lift bag.
  • Course Tuition
  • PADI eLearning 
  • Certification card
  • Dive site entry from £25 per day.
  • Transport (we will do our best to arrange lifts if needed)
  • Air fills these are payable directly to the site.

For further discounts & offers Join Uk Diving Academy Dive Club.

How To Book

Enrol onto the course by making your purchase online through our website. You will then receive an email asking for some more details to get you registered and also offering some help to get you started with your online materials.

After that, we will send you more details on logistics of your course, such where to be and when. If you already know which of our upcoming course dates suits you best, please book this date if you are unsure or can’t find a date that works for you simply give us a call to discuss this further.

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Keep diving in your local area by joining our dive club. Our dive club members are all active fivers in the local area. The dive club is open to anyone - whatever agency you trained with, whatever level of diver you are. All you need is a love of diving!


We also organise several holidays each year, UK and abroad, as well as shore dives off the UK coast and regular dive weekends to Vobster Quay. On top of all that there is also regular social events and activities including paintball, 'dry dives' in recompression chambers and regular club meetings.

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