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Actually anyone can stamp the CROWN of a cylinder (in the U.S. I don't know what the laws are in other countries.) (except for composite cylinders of course which aren't stamped at all.) Stamping the sidewall condemns the tank (US DOT/UN-ISO..."condemn all sidewall stamped US DOT and UN-ISO...

I don't put much credibility in the "thru the cinder block wall" test. You can hit a cinder block with a rubber mallet and knock a hole in it. A cinder black in not much more than glued together dust. My concern in a shear would be the VALVE, not so much the cylinder. Having less mass than...

Definitely won't find that one at Starbucks. ;)

The short answer is ALL steel that is exposed to oxygen and water rusts. Corrosion is a process of combustion. Water accelerates the process and salt water accelerates it even faster. "Rust" happens when an Iron atom loses electrons to an Oxygen atom. For the Iron electron to get to the...

Look guys don't be wasting your money on them expensive generic eBay stickers. I got them as cheap as a .75 cents each. Just $8 bucks per dozen plus postage. :)

It's a confusing subject with many dive shops just making up their own rules as they go because they don't know. Most of the tank fillers at my LDS haven't take the VCI course so they just know what other people tell them, right or wrong. And it even varies by whoever the FSO is at the time...

Yeah that's it. I have mine printed in a "5 year window" with the full 4-digit year on them because I'll run out before 5 years anyway and have to reorder. I can just open the file and change the dates with GIMP. No big deal. My current stickers show 2018 to 2022. It'll take me about 10...

I didn't know. The last course I took about 6 months ago they sent me a plastic card in the mail. I don't even know where it is now. In a drawer somewhere at my desk probably. I suppose some rinky-dink dive operators in third-world countries don't have computers and still need to see a...

Wheel Gun huh? Nice. My sister carries one of those in her purse. :) LOL just messing with you, Bro.

Some of them are dicks. Many of them are just good guys who don't know any better. The minority are actually pretty decent guys who shut up when they realize it's time to shut up. Nobody likes the Puddle Pirates until they need them. That's the way it is.

I gotcha. Cheaper to play the game than it is to argue your case. We had some plumbing hooked up to a shower on deck for divers to rinse off with. Inspector came that year and told us it was not permitted that we had to re-plumb the thing with steel pipe not PVC. So we just removed it all...

I agree. The whole C-card thing is a money scam. I have a pile of about 10 C-cards now I've accumulated over the years. I wish they'd just go electronic and quit charging me $40 for a new card everytime I take a course. They could just update my record in their database and skip the whole...

Smart modification. This guy's was straight out of the box.

I agree with a lot of the posts here and arguments on both sides are convincing. But you know how it is in the real world. Arguing with the CG is like telling the cop that he's wrong and you're damn sure that light was green when you went thru it. :) GG has a habit of making it real tough on...

I've found that on the reef (30-35 feet) I can "squeeze" about 70 minutes out of an 80. Now I'm not a boat cap'n, but if I was, I wouldn't try to sell that as a 2-dive trip and a half-hour surface interval "half day trip" if common sense told me it was gonna take me 5 hours to accomplish all...

I don't know the answer to your question, but I can tell you the dive shops experience. We have a small pontoon boat that we take out to the training site. We are advised by the Coast Guard that we can't ferry students to the dive site because they paid tuition for the class and that would make...

I get the short fill thing. I don't think they do it on purpose (most of the time). Luckily, my LDS knows me well enough I just walk in and fill my own tanks and pay the guy at the counter, so I can make sure they're topped off. I'll usually pump my AL80 to 3400 and my steel to 3800 and it'll...

Agreed. I know a shop that advertises the "Advanced Open Water Course" for like $200. I though WOW! what a great deal! Then you read the little teeny fine print that they hide by printing it about 1 pixel tall "Price doesn't include boat charter and air fills and equipment rental"......So...

SERVICE. It amazes me how crappy customer service is nowadays. I firmly believe that money just comes too easy for businesses nowadays. They don't give a rats behind if you're a satisfied customer or not. If money didn't come too easy, they'd strive to create and maintain a customer...

Most of our dives here are limited by gas supply, not NDL's. Both operators in the area explicitly state that their half day trip is "two 45 minute dives with a short surface interval in between." so that's what I expect to receive for my money, and I'd claim that their statement in writing...