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Hi All. I'm planning on going to Thailand on my way back to Australia from the UK in November. I'm like to do a livaboard, but my wife dosen't as she gets very seasick very easily (so do I, but I'm willing to go through the pain to dive!). Also, we have tried every medication/herbal...

The minimimum diving requirement for the TDI course is 25 dives + basic nitrox, so you can't take it anyway. In terms of o2 theory/MOD calculations/etc. there is nothing new on the advanced nitrox course - you are just using different numbers for your calculations. It brings more dive skills...

This guy seems to think it's okay.

eh? Fill pressures and even temperatures are critical in the imperial system. 100cf and 80cf can be compared, assuming they are filled to their rated pressure. But with what I read, particularly regarding tech diving in the US, tanks are rarely filled to their rated pressure. Even...

One of the Egyptians working on the livaboard I was on in the red sea earlier this year had done his OW checkout dives but hadn't completed his classroom work. He completed his 200th dive in January. The PADI Course Director who works as the "english guide" on the boat didn't seem too worried.

Man, this is why I avoid this board nowdays. I make a good, valid point and people just wanna argue about nomenclature and forget about arguing the merits of the point.

Well, sorry to inform you of this, but your theory is incorrect. I never said PADI. If you read what I actually wrote, I said TDI - or Technical Diving International. Requirements for TDI Advanced Nitrox & Decompression Procedures course So yes, you can perform stage decompression...

Just my 2 cents.. I've noticed a couple of times people saying agencies require 100 dives to start technical training.. For TDI in the UK at least, this is false (well, depending on what you classify as "technical"). For Ad. Nitrox & Deco, the only requirements are 25 dives and 18 years of...

I've just come back (last week) from doing a liveaboard of the southern red sea (Elphinstone, Brothers, Daedalus). I also did day boats from Sharm mid last year and have done day boats from GBR the year before. I prefer wreck diving to reef diving. My wife prefers reef diving. The diving...

Nice report! sounds like a really interesting dive site. I'm not trying to be inflammatory, but just out of interest, is 21/35 expensive in Japan? I know DIR divers like to have an END no greater than 30m, but 21/35 seems like overkill for a 40m dive...

I dive doubles (or twins as we call them) and have done since about dive #45 or so. I usually dive them no matter what sort of dive I'm doing because I don't have a STA and my wing is a doubles only wing, means if I dive a singe I have to move back to my stab jacket. This keeps everything...

Link okay, 172F isn't 200F - but I did say approaching 200F.. I actually forgot what my .sig was until I posted, because it's been so long (I remember now why I left). You're right, my .sig doesn't lend credibility to my opinion and that wasn't (and still isn't) it's intent. My...

If you point a 300F heat gun at aluminium, it will only get warm. It's the AIR that is 300 degrees. The link you supplied talks about the alloy tank getting to temperatures in excess of 265F. To get alumimuim that hot, you would need at least a large propane torch and even then it probably...

Maybe you could have asked a less "political" question? :) Like "Do you think GWB is a good president??" lol To answer your question.. it all depends on what you want to achieve. I think both routes will improve your diving. TDI is more recognised worldwide and will be easier to get helium...

It also depends on where you live.. Here in the UK, from what I've heard "cave" diving is mostly "dry caving plus a bit of sump diving". The fully flooded caves are generally flooded mines and are very dark and very cold, with sidemount being the primary configuration (with no seperate BCD -...

Ever tried winding up a line thats slack? If the line isn't tight while winding you can tangle it without knowing it. Visible on the surface. It's the difference between the SMB lying down in the water and being hidden by waves or standing up 6ft out of the water.

I'm going to agree to disagree and leave it at that. Never said it wasn't. I was talking specifically about ascending (or is this what you meant?) I didn't want to bring up drysuits because I knew this would be the response. Somebody else brought it up and I simply mentioned that it's...

And when you are told you're wrong, you just keep pounding away.. No one can visualise what I'm describing? There are dump valves at either end of an air cell. For air to go out of a dump valve, the dump valve has to be at the highest point. For the valve to be at the highest point you...

And when you are told you're wrong, you just keep pounding away.. No one can visualise what I'm describing? There are dump valves at either end of an air cell. For air to go out of a dump valve, the dump valve has to be at the highest point. For the valve to be at the highest point you...

If your wing is dumping air "beautifully" then you are not horizontal. The attachment of the inflalator on my wing when I am standing up out of the water is on my back, just above my left shoulder blade. *IF* you are *perfectly* horizontal in the water, the air that is in the wing should...