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I have some information posted on www.sump4.com/sidemount fairly specific to sump diving as practiced under UK conditions where there are few opportunities to dive using backmounted cylinders and cave divers adopt sidemount from the start. Duncan

The CDG has a female as one of its four regional training officers: Jo Wisely Technically we don't have official instructors and run a mentoring scheme with all qualified divers encouraged to educate aspirant cave divers. Each regional section of the CDG nominates (up to) 5 experienced...

I would echo this remark. When I've been diving with someone on OC I brief them that my ascents and decents will be slower and that I prefer to swim around objects rather than over them. Duncan

I would guess not in the same context. You'd have to be in at the start to make similar contributions. In present times, with a wider field it would be difficult to stand head and shoulders above the rest in the same fashion. However I can think of others in the European sphere who have...

{off topic}Why? I have never really understood this...is it a regional thing? The cave dives here in the UK are rarely deep or long enough (<100 ft) to make nitrox and deco that common. I guess the same situation largely applies in the Yucatan. I would be very interested in getting a...

That's the way most UK cave divers have learned since the early 60's when the CDG abandoned rebreathers (temporarily) and walking along the bottom (though old habits die hard). Many British cave divers had no formal diving qualifications before taking up cave diving so will have learned to dive...

The unit used is a Heyphone designed by John Hey and based loosely on the original molephone and in use by the cave rescue teams in the UK. The French version (Nicola Phone) has been tested to a through rock range of 1 km. More details: http://www.heyphone.org/ Underwater versions have...

See http://ukcaving.com/board/viewforum.php?f=24 They are dry cavers from a joint services caving expedition. Two civilian CDG divers familiar with the cave system have been flown in to assist.

It depends on the geology where you are diving. Caves tend to follow the lie of the rocks. In Florida a lot of the bedding is horizontal, thus you tend to descend between levels via shafts which makes for square profiles (or a combination thereof) which can be planned ahead using...

Thanks for the plug - thats exactly what a friend of mine with an Inspiration does - wear's his sidemount harness beneath the rig puts on the the rebreather and clips in his sidemounts. The size of the tanks depends on the sort of dive he was doing. We dived together in Florida a couple of...

Thanks - I have bought stuff from this lot before - they are very good. Duncan

Could you be more expansive on that? I am more interested in the specific components: DSV, hoses and scrubber. My friends and I wish to use these parts to construct our own fully closed circuit rigs for a specific diving project. I don't need a lecture on the perils of homebuilding. Just...

The dual outlet isolation manifold was invented in the US and its adoption has spread from there. As with any configuration, each has its merits and demerits. Often the favourable case it put for one option whereas only the drawbacks of the alternatives are promoted. I know of some (cave)...

I think that being able to lose all your gas at once is suicide. With independents (sidemount or backmount) you can only dump half your gas. With a manifold you do have the potential to isolate a rogue regulator and still have access to all your gas (providing you've got some left)...

Try "Spelology : Caves and the Cave Environment" by Nicholas Sullivan, George W. Moore for a start. Duncan

I was given a Jetstream recently with a long hose. In fact it was a standard hose which was then screwed in to another hose which had a female LP outlet at the other end (a bit like an exension cable). I brought the reg back to the UK but the hose is in the US. I'm sure you could have it if...

Exactly, the deepest cave dive in the world (Bushmansgat) starts from a water level 1550 m above sea level. There's little point is comparing "records" between various sites, whether done open circuit, with or without scooters or solo/team. They are all achievements in their own right with...

The British (stated diving CCR's in caves in the 1940's - as did the Italians), French (recent dive to -180 m 12 hr dive in the Goul de la Tannerie on twin SCR's), the Germans (our friends in the EKPP) and Swiss to name a few. I'm only really up with what the Brits are doing - two of them took...

Actually, everyone started out driving on the left. This is so that horse riders and wagon drivers would pass right shoulder to right shoulder on the highway leaving their sword/whip hand free to defend themselves. The driving on the right was started by Napoleon to "confuse" the inhabitants...

Home Depot? (apart from the surgical tubing) That's where I got my supplies from when I was over in the US. Duncan