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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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Last Post
Question - What other features to look for in a dive computer for beginning technical diving? Particularly there are models allowing two and three switches ...
I am about to buy a new dive computer and I would like to get one that would be useful for beginning technical diving. It strikes me that spendin ...
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8 April Tuesday, 5:51 PM
Question - Greetings, this is my first posting. I'm a working PADI DM since 2003, thinking of doing my IDC, BUT I want to do some techinical stuff first t ...
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7 April Monday, 4:35 PM
Question - rehydrate in water
on another thread you state "On long dives (runtime over 90mins) you must make provision on open circuit diving to rehydrate in water - do not try ...
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7 April Monday, 4:34 PM
Question - cordite was washed up on the Rhinns of Islay (Isle of Islay) about 20 yrs ago. I was wondering if you might be able to tell me which wreck this wa ...
Is cordite safe to burn, but not when the sticks are bundled up, or contained? What does it smell like? Peppery? Thanks!
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1 February Friday, 3:07 PM
Question - How do I know for sure if my Neprene wetsuit is too small
Seems tight to me but its the first time I tried one on. Thanks
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1 February Friday, 2:58 PM
Question - Hi Andrew. I'm preparing myself to go the technical route. What makes one regulator more suitable than the next. Whenever you speak to EQUIPMENT d ...
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11 January Friday, 11:14 AM
Question - Hi I am currently looking at purchasing my 1st rebreather and was wondering which would be the best one to purchase. I would want to use it to ...
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359
19 November Monday, 3:43 PM
Question - looking into buying a new drysuit i currently have a membrane suit but it leaks pressure testing repair didn't work. your thoughts on membrane v n ...
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305
19 November Monday, 3:41 PM
Question - Hi Andrew, Which torch would you recommend for technical diving? I have looked at GreenForce, Halcyon and Metal Sub. I am prepared to pay up to ...
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310
19 November Monday, 3:21 PM
Question - Good day Andrew, Part of my work when I was in South Africa, was to dive on electronic systems in False Bay. Now being in the UK have no use for t ...
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19 November Monday, 2:38 PM
Question - hi i was wondering i just gone onto a twin set and have been sorting out the weights and ive got it down to 2kgs but i feel i could get away with ...
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19 November Monday, 2:33 PM
Question - hi i was wondering whats your take on weights ive just moved onto a twin set 12ltr and use 2kilo weight belt but feel i could do away with any wei ...
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19 November Monday, 2:31 PM
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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239
19 November Monday, 2:16 PM
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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29 August Wednesday, 10:05 AM
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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27 August Monday, 9:49 AM
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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.