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I often breath through my nose underwater. But I only breath OUT through it... ;) If she has access to a properly fitting mask there is relatively simple way to practice this without risking of a nose full of water. Simply place your mask against your face (don't put the strap around...

I have a slightly different question. I've always used Alkaline batteries and never had a problem with burn times or fuses... My issue is that the light has started to 'flicker' no matter how new/old the batteries are. It comes on just fine every time but when it comes up to full...

Yah, D.I.E.D. wouldn't convey your message very well at that, would it? Not that I have a better name to contribute but I'lll think about it and post if I come up with anything ;)

Right, that's what I said. The parts are clearly labled that they are O2 compatible but will need to be O2 cleaned before using them for an O2 clean regulator rebuild. This is simply and obviously a cost saving measure on their part because ther is only one kit for ALL apeks first stages and...

Hehe. Apeks also has(had?) a version of the ATX40 that even comes from the factory O2 clean and sealed up in a bag to keep it that way. At least untill you use it the first time. ;) I have 2 I use for deco bottles. The only visible difference to the 'standard' atx40 is the plastic trim...

Well, to a certain extent you CAN assume constant flow for most of the time the tank drains. Crack a valve open and it will only allow a certain lpm flow through reguardless of what the pressure is inside/outside the tank. Once the pressure diferential is reduced enough that the flowrate...

Flow rate of regulator X has nothing to do with using more gas per breath at depth. Regulator Xs flowrate will, however, determine its max usable depth limit though. ----------- EXAMPLE: At 33 fsw or 2 ATA (since that keeps math easy) the gas pressure you are attempting to breath in has...

For what it's worth, the only reg I've ever personaly seen anyone have an issue with underwater was a new cressi on its 2nd dive.... The very ticked off diver took it back and exchanged for a different brand at the shop the next day.I dunno if it was just tuned wrong or what but it shouldn't...

I've met one or two like that and one or two just the opposit... Safety stop? What's that? Oh. I don't do decompression diving so they are a waste of time. I'd rather spend more time on the dive itself. Opposit ends of the spectrum but similer destinations I think. Life is a circle...

Unless you remove the valve (yes it should be possible as there will be no pressure differential across the threads) then it's gonna take a LONG time to get through the 'bottleneck' ;) of the tiny air channel through the valve itself. Two way traffic on a one lane road is never very efficient...

Um... I'm just about to go to sleep but I can't see what SAC rate has to do with the emptying speed of a free flowing tank... Just because YOU use gas 5 times faster at 130 fsw doesn't have any bearing on how fast your tank will drain in a freeflow situation. The gas INSIDE the tank is...

Yes, The instructor I mostly work with will 'dual' cert students in some courses for PADI & SDI/TDI if requested. We'll do the PADI cert using PADI materials/methods and then go over any differences there may be between the 2 cert materials and then have them take the final test for...

I chose no because I almost never go there 'just to dive' so I pay as I go for that. I do go sometimes as a DM with one of the shops instructors. If you go as an instructor/DM with students it's free to get in... Just have to fill out paperwork once each year.

SDI/TDI used to be just TDI (Technical Diving International) and only offered higher level courses. In the last few years, they added SDI (SCUBA Diving International) which is the "rec" side of the organization to start competing with PADI, etc for the 'new' diver market... On the flip...

Kinda long story... I had a nasty reverse sinus block on a 3 M/15 foot dive... Apparently I had gotten a cold just before going on a trip to Florida (or on the plane going there) to do my tri-mix course. The first symptoms showed up when we were already on the diveboat. The first day...

I have an Nitek He and I think it works just fine. I normaly tech dive with tables from V-Planner and a 200 meter g-shock watch on my arm (but the watch is prety much there 24/7 so does it really count as dive gear?). The He has been +/- about a minute or two of the tables on almost every...

I've got it! "High Planes Drifter" It looks like it should go fast up on plane and after all of Pugs stories about his anchor dragging advetures, well it just seems obvious to me... ;)

Trapeze? I dunno, I've never used one. All the deco I've done was either on a line or on an SMB... With a large group I suppose it would be helpfull to spread out the divers on the last stop (we just use our reels as john-lines if it gets too crowded on a line - keep it simple). You...

I won't answer the gas question right now as I'm not home and dont have access to my dive software/tables etc... As for not anchoring the boat, it is really not a big deal if you are working with reasonably experienced divers. Just take a large float (we use an orange float ball about...

I stumbled across a "Learn ASL at home" program on CD-rom at a computer show/swap meet a while back and bought 2 copies. I gave one copy to my buddy. I tried to install it but it has some ugly issues with XP... I sort of got it to work just enough to be able to figure out how to sign...