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, 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 ...
21 May Monday, 11:53 AM
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 ...
6 May Sunday, 8:00 PM
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 ...
28 April Saturday, 3:27 PM
Question - Andrew - I am very much interested in progressing down through the technical side of diving. I have just signed up to do the ANDI CSU Level 1 and ...
27 April Friday, 11:12 PM
Question - Hi Andrew, thanks for the reply on dye markers. I have ordered two OMS markers from the states as I could not find any in the UK. All I wanted t ...
24 April Tuesday, 11:01 PM
Question - hey up i was just wondering what ur advice would be to me, i would like to be a clearance diver in the RN but i ve neva dived b4 in my life.would ...
9 April Monday, 6:20 PM
Question - Hello, I'm a padi msdt and new to the diving scene in the uk. I was thinking of getting into the tech side of the sport and was considering purcha ...
2 April Monday, 11:07 AM
Question - am in the process of taking a pony on board my kit as purely a bale out option. was considering where to mount the pony side or even rear mount o ...
using a 3lt pony with standard 12lt cylinder
2 April Monday, 10:44 AM
Question - Hi Andrew, How long can the air last in the cylinders
I have just bought some dive gear and the cylinder is reading almost full, I think it has been standing for 16 months. Best regards, El
28 March Wednesday, 10:28 AM
Question - Can you help, Im new to diving and just starting to build my kit list, what is the best thickness for boots is it 5mm or 3mm this is wetsuit divin ...
23 March Friday, 6:38 PM
Question - Hi there. I am a PADI Master Scuba Diver with around 120+ dives most of which have been in UK waters. I'm considering moving onto more technical d ...
11 March Sunday, 9:05 PM
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 dep ...
11 March Sunday, 8:41 PM
Question - i have just purchased a wetsuit for diving in south africa and although it fits well everywhere else it is really big in the arms, it looks like " ...
2 March Friday, 11:01 AM
Question - I am thinking about taking up deep diving with a rebreather could you give me some advice on the best route to go down as I need to be ready for d ...
1 March Thursday, 6:53 PM
Question - Do u know the reliability of the radio transmitter used on the vytec ds as I am interested in buying 1 every1 in my club all use the cobra and it ...
23 February Friday, 10:06 PM
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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.