Technical Q7A Forum

All questions are answered by Andrew Dawson-Maddocks, Director of training at the ADM Diving. Andrew has over 3000 dives logged across 4 continents and has amassed many stunning dives to 90m and beyond . ADM Diving & Technical Services Ltd is proudly associated with PADI, IANTD, EFR and DAN, offering an extensive range of training programmes.

Questions posted to the technical q & a forum page are sent to Andrew for his comment and reply. Once a reply has been sent, both the question and answer will post to the forum page.

Questions are shown in Red and the answer from Andrew is shown in Blue. Once an answer is posted, it is then possible for other users to post additional comments, these are shown in black.

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Question - Andrew - My question regards equipment. I am going to purchase a wing and twin-set prior to beginning down through the technical ranks. I want so ...
I am aware of the weight issue with regard wall thickness on the 10ltr 300bars but I am considering the buoyancy aspect. The wings I have been ...
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Question - Hi I am thinking of inverting my twinset (10L) I like the idea of being able to get to your valves more easily. As I really struggle to reach them ...
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Question - Andrew, I am torn. How do OMS wings compare to Custom Divers wings? Which is the one most technical divers use? I have tried both and like both. W ...
Whichever one I purchase it will be for mid range technical diving progression, capable of supporting side slung 7ltrs, have a twin bladder, plent ...
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Question - Which diving computer?
Hi there, I am an AOW diver with roughly 60 dives. I am planning on going on a diving holiday this Summer and was thinking about getting a divi ...
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Question - Hi Andrew, I have a question concerning the different tech diving organisations and the courses they run. I am looking at entering the world of t ...
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Question - Hi Andrew. What is your opinion of the Custom Diver's TCW dual bladder wing. I have the option to buy an immaculate second hand one for £250. I ha ...
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Question - Hi Andrew, Sorry to bother you again. What is your recommendation for gauges for a twin set rig? The ones I am looking at are the Apeks streaml ...
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Question - Wing configuration: I dived my TCW dual bladder wing for the first time today. For a first dive with one it felt ok. Any tips on hose routing or ...
The right inflator comes from slightly behind the bladder so comes up a little short. It kept dropping behind me only for me to fish it out. Also, ...
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Question - Can you advise on wet suit sizes am a big guy and have used a wet suit marked XL-G would that mean xl girls or xl guys
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Question - I am not a diver but I am disgusted with the diving of War Graves such as Galahad, HMS Prince of Wales etc…. do you agree with the diving of these ...
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Question - forgive me if this is posted to the wrong person. My husband is being treated for tongue cancer and the treatment means that he will lose his sal ...
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Question - Can you advise the best way to resolve problems with equalisation. I have tried the pinching of the nose to pop them but this results in pain & th ...
I have saught the advise from my doctors surgery who have prescribed antibiotics in case I have blocked tubes from a head cold, however, I have be ...
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Question - Hi, my partner and I are visiting Egypt in a few weeks and plan to do a lot of snorkling. My partner is looking to purchase a prescription mask (s ...
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Question - Hi Andrew. A sort of medical question if you please related to a possible barotrauma. May have to post this one in the medical forum depending on ...
Yesterday I was at Dorathea. The first dive we descended to 50m for an ABT of 17 minutes. We then slowly ascended up and over the shelf past some ...
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Question - Andrew - I have just enroled on the ANDI TSD level 3 course which is the first technical grade in teh ANDI system. Prior to the course beginning o ...
My question is this. On the course would the weight belt be around your waist (not on the wing), or as in reality the 4kg are on my TCW belt. This ...
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The views expressed by the author are their own and the publishers accept no liability for the advice and views expressed by the author, or other users, which are provided as a general service to divers. Users are warned that secondary posts are the views of other users and may not be technically correct.