technical Dive Courses at the National Diving & Activity Centre Dive School, based in Chepstow
The National Diving & Activity CentrePADI SDI TDI

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(Clear of water 1 hour before end of session)
We are open for Scuba Diving Thursday-Sunday and Bank Holidays. During School Holidays we are also open Monday & Tuesday. Full opening times ›

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Activities are open most weekends, bank holidays, selected dates during School Holidays & occasional mid week dates.


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Centre Information

National Diving & Activity Centre
Tidenham
Chepstow
Gloucestershire
NP16 7LH
 
Tel: 
 
 
email

Please be advised that the NDAC office is closed Monday to Wednesday, so emails and phone calls may not be responded to during this time. Depending on when you make your enquiry it may take a few days before we can get back in touch with you.

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Tech Diving

We are pleased to offer a range of various technical courses overseen by our technical instructor – Mark Culwick.

The courses range from two to five days, depending on the course content.

Any customer wanting take their first steps into the world of technical diving or those who wish to further extend their skills will find our programme both flexible and rewarding.

Use of school kit will be available on certain courses and for others kit will be available to hire. Please ask at the time of booking.

You will be required to complete all statutory paperwork and to provide evidence of your highest level of certification and verified dives. Specific pre-course requisites will be discussed on enquiry.

Please feel free to call Mark on to discuss your requirements or initially, please refer to the individual course information below.

TDI Intro to Tech
Course Codes NDAC-TDI-ITT

Technical Diving International - TDIDuring the past few years there has been an explosion in interest in the field of technical diving. Have you ever wondered why people jump into the water with so much complicated looking kit? Why do they do it? Where are they going? How do they manage it?

Well the objective of this course is to answer these questions, to give students an opportunity to familiarise themselves with technical equipment configurations that could, with the right guidance, get them comfortable in unfamiliar equipment and stop them from making expensive mistakes when it comes to equipment purchase and futureproofing themselves dependent on where they may see their technical diving journey going. The course will also expand on the key skills learned on introductory level diving courses such as breathing, buoyancy control, trim, propulsion techniques and situational awareness. Finally the course introduces the student to advanced gas planning techniques within the no stop diving context.

The course is excellent preparation for the next phase of training if the student chooses to progress to courses that involve decompression procedures techniques. However, this course can also be used from an experiential perspective with the added bonus of continuing to dive in the no stop range, in a planned way with multiple tanks and with an excess of gas, which of course is never a bad thing.

Qualification Depth
No depth rating earned – experience program only.

Completion with participation

 

Duration Cost Previous Experience/ Notes Dates

2 days (minimum 3 dives)

£250

Includes: Manual, Certification, All equipment hire required

Excludes: Site Entrance/Boat fees, Air Fills

Minimum age: 18

Logged dives: 25

Minimum qualification: SDI Open Water Diver (or equivalent)

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

Pool Based Rebreather Try-Dive
Course Codes NDAC-PB-TD

We offer you the opportunity to experience a supervised dive on a re-breather in the confines of a swimming pool.

The session will be overseen by our Technical Instructor – Mark Culwick and will take place at either Thornbury Leisure Centre or Fitzalan High School Pool.

During the session you will spend:
  •   45 minutes orientation to the rebreather unit and implicit workings
  •   45 minutes dive under supervision to a maximum pool depth of 3 meters (Thornbury) 2 meters (Fitzalan)
  •   30 minutes de-brief, caring for unit and discussing the way forward

Following the dive, should you decide to sign up for a formal course then the cost of the Try-Dive will be refunded against the course cost. To get this refund you will be required to book within 2 weeks of the dive and pay in full for the formal course. Refunds will not be given but we can be flexible about a change of date in special circumstances.

Duration Cost Previous Experience/ Notes Dates

Thornbury Leisure Centre
Sunday 10am – 12noon

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Fitzalan High School Pool
Wednesday 6.30pm – 9.00pm
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£55 per person with a maximum of 2 people per session.

Minimum age: 18

Customers will be required to present their highest level certification card and logbook and complete the necessary paperwork prior to entering the water. You should be in good health and general fitness.

At least Open Water qualified

Proof of 20 verified Openwater dives (Last dive within 6 months of Try-dive)

Proof of Enriched Air Certification from a recognised Agency.

Thornbury Leisure Centre (Sundays)
24 Jun 2018
15 Jul 2018
05 Aug 2018
16 Sep 2018
07 Oct 2018
28 Oct 2018
18 Nov 2018
09 Dec 2018

Fitzalan High School Pool
13 Jun 2018
04 Jul 2018
25 Jul 2018
15 Aug 2018
26 Sep 2018
17 Oct 2018
07 Nov 2018
19 Dec 2018

Booking Information>       Back to Top>

TDI Advanced Nitrox & Decompression Procedures
Course Codes NDAC-TDI-ANDP

Technical Diving International - TDIThis course is the foundation course in technical diving. All technical dive training taken after this course is completed builds on the skills and attitudes learned while undertaking this course. The course examines the theory, methods, and procedures of planned staged decompression diving. The course objective is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of 45m using staged nitrox up to 100% to accelerate the decompression.

This is the ideal course for diving in Scapa Flow and many of the UK’s coastal wrecks.

Please note: Advanced Nitrox and Decompression Procedures can both be facilitated as standalone courses in their own right. Please contact us if this is something you are interested in (300 per course).

Qualification Depth
45 meters maximum utilising up to 100% oxygen for accelerated decompression.
Course is performance based.

 

Duration Cost Previous Experience/ Notes Dates

4 days
(minimum 6 dives)

£525

Includes: Manual, certification, use of 02 analyser, twinset, regulators and stages

Excludes: Site entrance fees, gas fills, equipment hire (canister torches, SMB’s, slates etc.).

Minimum age: 18

Logged dives: Proof of 25 logged dives

Minimum qualification: Minimum certification of SDI Advanced Adventure Diver, Advanced Diver, or equivalent.

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Advanced Nitrox & Helitrox
Course Codes NDAC-TDI-ANH

Technical Diving International - TDIThis course is similar in nature to the Advanced Nitrox and Decompression Procedures course with all the same skills and a depth rating of 45meters but utilising enriched air nitrox and helium mixtures not exceeding 20% helium content or less than 21% oxygen content. This will give the diver a benefit as it pertains to gas narcosis allowing the diver to dive to depth but without the full impediment of narcosis. There are also some additional equipment configurations to discuss and a additional theory component to the course as it pertains to helium use.

Breathing gas mixtures containing more than 20% helium and less than 21% oxygen are not permitted.

Please note: Advanced Nitrox and Helitrox can both be taken as standalone courses in their own right, Please contact us if this is something you are interested in (£300 per course or £150 for Helitrox upgrade if already a Decompression Procedures diver or equivalent).

This is the ideal course for diving in Scapa Flow and many of the UK’s coastal wrecks.


Qualification Depth

45 meters maximum

Breathing gas mixtures cannot contain more than 20% helium or less than 21% oxygen
Utilising up to 100% oxygen for accelerated decompression

Course is performance based

 

Duration Cost Previous Experience/ Notes Dates

4 days
(minimum 6 dives)

£525

Includes: Manual, certification, use of 02/He analyser, twinset, regulators and stages

Excludes: Site entrance fees, gas fills, equipment hire (canister torches, SMB’s, slates etc.).

Minimum age: 18

Logged dives: 50

Minimum qualification: SDI Advanced Diver (or equivalent) with Deep Speciality or TDI Intro to Tech. Must be certified as TDI Advanced Nitrox Diver to undertake Helitrox course.

While not a requirement, we strongly recommend that the course is conducted using a twinset.

If you have never used one before, this course can be taken in conjunction with a Twinset Familiarisation Course. Please get in touch with us if you are interested in this course.

Twinsets/regulators are available for hire for the duration of the course.

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Extended Range
Course Codes NDAC-TDI-ER

Technical Diving International - TDIAs with the stepped philosophy that TDI training programs implement, the Extended Range courses serves to build on prior knowledge and skills to enhance your diving capabilities and leaves you qualified to take on more challenging and adventurous dives. The course will reinforce much of what has previously be learned but will go into greater depth as well as introducing new concepts and ideas.

The course will provide the training and experience required to competently utilise air for dives down to a maximum of 55 meters with staged decompression utilising up to 100% oxygen. The objective of the program is to train divers in the proper techniques, equipment requirements and hazards of deep air diving to this depth.

Qualification Depth
55 meters maximum using air as backgas

Utilising up to 100% oxygen for accelerated decompression

Course is performance based

 

Duration Cost Previous Experience/ Notes Dates

3 days
(minimum 4 dives below the depth of 30m, two of which below 40m with minimum accumulated bottom time of 100 minutes)

£510

Includes: Manual, certification, use of 02 analyser

Excludes: Site entrance fees, gas fills, all equipment hire

Minimum age: 18

Logged dives: Proof of 100 logged dives (25 of which must be deeper than 30 meters)

Minimum qualification: TDI Advanced Nitrox & Deco Procedures (or equivalent)

If you have never used one before, this course can be taken in conjunction with a Twinset Familiarisation Course. Please get in touch with us if you are interested in this course.

Twinsets/regulators are available for hire for the duration of the course.

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Trimix
Course Codes NDAC-TDI-T

Technical Diving International - TDIAs your motivation to explore progresses you may find that you wish to go deeper to dive that historical wreck or that cave system that you have read so much about. Alternatively you may just want to continue your journey and learn new skills and techniques.

One of the limiting factors of diving deeper is gas narcosis; TDI’s Trimix Diver course shows you how to minimise the effects of gas narcosis by using helium in place of a percentage of the nitrogen in your breathing gas.

During this 4 day course you will be shown how to competently and safely utilise how to plan for dives using helium in the backgas, the limitations of using helium and the impact of helium on decompression.

Qualification Depth
60 meters maximum using Trimix as backgas (Oxygen content no less than 18%)

Utilising up to 100% oxygen for accelerated decompression

Course is performance based

 

Duration Cost Previous Experience/ Notes Dates

4 days,

(minimum four dives with a minimum accumulated bottom time of 100 minutes, two of which below 40m)

£600

Includes: Manual, certification, use of 02 analyser

Excludes: Site entrance fees, gas fills, all equipment hire

Minimum age: 18

Logged dives: Proof of 100 logged dives

Minimum qualification: TDI Advanced Nitrox & Deco Procedures (or equivalent)

The course must be conducted using a twinset. Twinsets/regulators are available for hire for the duration of the course.

 

29 Mar - 02 Apr 2018

24 - 26 May 2018

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Advanced Trimix
Course Codes NDAC-TDI-AT

Technical Diving International - TDIThe TDI Advanced Trimix course provides the training required to competently and safely utilise breathing gasses continuing helium and oxygen (below 18%) mixtures for dives that require staged decompression to a maximum depth of 100m.

The objective of this course is to train divers in the benefits, hazards and proper procedures of utilising custom trimix mixtures as breathing gas.

The course is ideal for diving amazing places such as Malin Head in Eire.

Qualification Depth
100 meters maximum using Trimix as backgas

Utilising up to 100% oxygen for accelerated decompression

Course is performance based

 

Duration Cost Previous Experience/ Notes Dates

4 days, (minimum four dives with a minimum accumulated bottom time of 100 minutes, two dives of which below 70m)

£650

Includes: Manual, certification, use of 02 analyser

Excludes: Site entrance fees, gas fills, all equipment hire and instructor helium

Minimum age: 18

Logged dives: Provide proof of a minimum 100 logged dives with 25 deeper than 30 metres.

Minimum qualification: TDI Extended Range or Entry Level Trimix Diver, or equivalent.

Show proof of experience using twinsets.

The course must be conducted using a twinset. Twinsets/regulators are available for hire for the duration of the course.

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Air Diluent Rebreather Diver
Course Codes NDAC-TDI-ADRD

Technical Diving International - TDINo doubt if you are considering this course, you have already done some research on rebreathers, and maybe even had a go! The reasons for taking this step are many and varied, but whatever it is that has motivated you to do so, this is the entry level rebreather course that will take you safely into the world of silent diving!

This is the entry level certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for air diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills to a maximum depth of 30 metres , using air as a diluent. No decompression diving is allowed on this course.

Currently, all training is done using the AP Closed Circuit Rebreathers:

• Inspiration Classic
• Inspiration Vision
• Evolution
• Evolution Plus.

Units are available to hire for the duration of the course, or we are an authorised dealer for AP Diving and can advise you on and the arrange the purchase of a new unit.

We do also have some second hand units available at times. Please have a chat with your instructor about all these options.

Qualification Depth
30 metres - Air as diluent

Performance based course

 

Duration Cost Previous Experience/ Notes Dates

5 days

£600

Includes: course manual, certification

Excludes: oxygen/absorbent fills, equipment hire, site entrance fees

Minimum age: 18

Logged dives: 20

Minimum qualification: TDI Understanding Nitrox (or equivalent)

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

TDI Air Diluent Deco Procedures Rebreather Diver
Course Codes NDAC-TDI-ADDPRD

Technical Diving International - TDIThis is the certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for air diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills to a maximum depth of 45 metres / 100 feet, using air as a diluent for formal decompression diving.

Currently, all training is done using the AP Closed Circuit Rebreathers:

• Inspiration Classic
• Inspiration Vision
• Evolution
• Evolution Plus.

Units are available to hire for the duration of the course, or we are an authorised dealer for AP Diving and can advise you on and the arrange the purchase of a new unit.

We do also have some second hand units available at times. Please have a chat with your instructor about all these options.

Qualification Depth
30 metres - Air as diluent

Performance based course

 

Duration Cost Previous Experience/ Notes Dates

5 days

£600

Includes: course manual, certification

Excludes: oxygen/absorbent fills, equipment hire, site entrance fees

Minimum age: 18

Logged dives: 50

Minimum qualification: TDI Advanced Nitrox & Decompression Procedures (or equivalent)

OR

Minimum age: 18

Logged dives: 50

Minimum qualification: TDI Air Diluent Rebreather Diver (or equivalent)

30 hours & 6 months Closed Circuit Rebreather (CCR) diving experience

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

Booking Information>       Back to Top>

 

DSAT Enriched Air Gas Blender / Trimix Blender
Course Codes NDAC-DSAT-EAGB or NDAC-DSAT-TGB

DSAT Gas BlenderWhy DSAT Gas Blender?
More people are diving with enriched air and this means the demand for enriched air fills is also increasing. However, there needs to be someone qualified to administer these fills to meet this demand. This is where the DSAT Gas Blender course comes in. It can result in one of two certifications: DSAT Gas Blender or DSAT Trimix Blender.

What do I need to start?
PADI Enriched Air Diver certification (or qualifying certification from another organization)

  • Minimum age: 18 years old

What will I do?
The DSAT Gas Blender course will train you as a qualified gas blender, allowing you to provide gas mixes to appropriately certified consumers. You'll learn the physical properties of oxygen, its associated hazards, handling requirements and what cleaning equipment is necessary. Finally, you will learn the five methods of obtaining the desired enriched air nitrox mix and the various methods used to obtain proper helium mixes.

What will I need?

  • DSAT Gas Blender Manual
  • Gas Mix Calculator

 

Duration Cost Previous Experience/ Notes Dates
1 Day £95 Enriched Air or £95 for Trimix

PADI Enriched Air Diver certification (or qualifying certification from another organization) or Enriched Air Blender for Trimix.

Minimum age: 18 years old

 

Experience has shown that Technical Diving Courses often need to be tailored to the individual, so please get in touch to discuss suitable dates.

 

Booking Information>       Back to Top>

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