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$75 incl priority mail shipping

$50 incl freight

$50 as is $100 with fresh hydro

I carry a storm whistle, 3' smb, mirror, light, 6' dsmb, and spool on every dive. The 6' dsmb is rolled up in a mesh bag attached to the bottom of my backplate. I don't even know it's there. A snorkel is a handy thing when floating in the ocean The bias should be towards staying in place...

IMO it would be difficult to convince 12 jurors from Montana who are not divers that this was anything more than a tragic accident that demonstrates why sensible people don't scuba dive. There are too many moving parts and the individual elements of the accident chain all occur frequently in...

It happens. I've picked up mistakenly un-filled "fill" at least once and once picked up a VIP'd cylinder that was assembled incorrectly and leaking that was therefore empty when I went to use it. Over a couple hundred fills between me and my kids. Also LP cyls not filled to the +10% "plus...

Dacron is polyester and it holds knots reasonably well and had neutral buoyancy Nylon holds knots less well Polyethylene is floaty and holds knots least well

I offer these observations: It is an important to have an instructor who you get along with and who is patient with you. Sometimes, capable instructors have trouble with certain students that other instructors do not. Advice upthread to seek out 1:1 instruction rather than a class with other...

You can probably fix the existing valve. They mostly take standard parts. The burst disk assembly should be replaced with a modern one with three outlet holes, see my thread on A&I from a few years ago for reasons. Otherwise, I have an extra 1/2" ngt valve right here that I would like to get...

Sure, do what you want. There are no scuba police except the ones in your head. Secondaries can be rented, borrowed, purchased, etc. Most of my dives are solo dives. Even on solo dives I have a secondary, except in some very unusual situations*. In waters frequented by divers, I never...

Like others, I've never been asked to produce a logbook, but am periodically asked to show a c-card.

The goal of the Thermo design is to avoid having the gas in contact with the bonnet threads. It is a common approach in industrial cylinder valves where the gas may be more corrosive than the atmosphere, or where the threads may be a source of unwanted impurities. I'm not sure the design...

I've been on the Spiegel Grove, the Duane, and the Vandenburg. Three things make the Vandenburg more difficult: 1) In practice, it's a deeper dive than any of the others. The deck is at 95 fsw and there isn't much to see, or much shelter from the current, above that. 2) Because there's...

Hydro recently expired. Made by Walter Kidde 22 lbs empty 3AA1800 52.8 cf at 1980 PSI 6.9" diameter 23.75" high Buoyancy with valve empty approximately +3 Buoyancy with valve full approximately 0 (neutral) weight empty 22 lbs Original liner has been removed by shot blasting Valve not included...

For a very brief time Worthington made a series of small X4 and X5 high-pressure cylinders. These were 3AA cylinders and therefore have a thicker wall than most HP cylinders and have negative buoyancy. Like other galvanized HP cylinders of that era there is a round-out process that must be...

This 3AA-2100 cylinder has 3/8" tapered threads and holds 1.8 cf. It comes with a high-pressure 3/8" to 1/2" adapter and a vintage I-valve. Cylinder was manufactured in 1960. Last hydro was on 10/17. You may find this useful for keeping regs pressurized while soaking them in a small sink...

They're what I use. A few, mostly older, yoke regs won't fit them. Try to get inserts that all use the same hex wrench. There are several "standards." Dive Gear Express has generic ones for $39 and Thermo ones for $50. They often have B-stock Thermo ones in their bargain section for half...

Well, to be very specific, the problem is that when the tanks are transported on their sides in a cart, trailer, pickup truck, or boat, they will eventually slide and hit a wall, bulkhead, gunwale, or whatever valve-first. The mass of the cylinder leads to an impact with quite a lot of momentum...

This is exactly the situation I have encountered. I would add that the situation is potentially worse if you ask for a "special" tank e.g. nitrox or a size other than 80 cf. Depending on the specific regulator and BC you're using, and your body shape, you may bump your head -- or not. Not an...

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