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The service tech should be examining the hoses for any visible wear, weather checking of the outer cover as well as any wrinkles in the cover near the first stage end. The tech should also be leak testing the finished reg and looking for pin hole leaks and small bubbles while it's in the water...

Some one mentioned a canted crossbar above. If the cross bar is not straight then it's stressed to the point of being bent, which is really bad. When assembling doubles you set the tanks on their backs and get the cross bar started evenly in each valve 4-5 threads and then slide the bands on...

Way back in the day we had nylon 1 and nylon 2 wet suits, referring to the presence of nylon on just one side or on both sides of the neoprene. There were also neoprene suits that used no nylon at all. That was significant as Nylon 2 suits were more durable, but Nylon 1 suits were more...

The last actual wet suit I bought was a 5mm that spent it's first week on dives in the 200' range. It was more like a 3mm suit after that, but it's still in use 5 years later. In fact, I like to take a new wet suit or semi-dry deep as soon as possible. Let's just get that inevitable...

This Uwatec Tec 2G dive computer has a new battery (user replaceable CR 2450), new protective screen ($18), and new Deep Sea Supply bungee boot ($18). The computer has a total of 81 hours on it, and other than minor sratches on the buttons, it is in perfect condition. It can be programed...

My point was not the depth of the deco stops themselves, but rather the differences between having your only computer crap out in open water versus a cave. In open water you can immediately shoot a bag or SMB and start your ascent, or tie in and create an up line and then start your ascent if...

If you you do some basic trigonometry you'll find you need about a 55 degree angle from the vertical to have 50' of line out from a 30 ft depth. That would require a pretty strong difference between the current at depth and the wind and current at the surface on a drifting deco. I've seen...

"Sourced" is the key word here. Let me give you a firearms example where the laws regarding importation and noting who manufactured it are very, very strict. FEG made a very faithful copy of the Browning Hi Power as the FEG P9 and sold it to both military and commercial customers. FEG is a...

How does that work in a cave?

If you screw it into a 7/16" to 3/8" HP port adapter, it'll work on 7/16" HP ports as well.

I had a Predator that started going through batteries in about a week and I sent it into Shearwater. They replaced the board on it at no cost, and the turn around time was about a week. I still have it and it's now the SA back up to my Fischer Ported CCR Petrel. My impression is that...

Threaded cartridges were more expensive than the non threaded variety. I tested my fancy, redundant, two cartridge 32 gram cartridge system - just before I plugged it with 3/8" LP port plugs. I then used the empty cartridges for years as first stage wrenches - since they had the same 3/8" thread.

CO2 detonators and bag breathing were separate solutions for similar emergency ascent issues. In both cases it's a given that you are out of breathing gas. It was after all the pre-SPG, J-valve era, and J-valves often got pulled accidentally. With an unbalanced piston first stage you got fair...

It was taught in my PADI course in 1985, but that was a semester long college course where a lot of things were taught well beyond the PADI OW curriculum, so it probably said more about the instructor and the time available for the class than it did the PADI standards at the time. Lung...

Jon made it very clear in our technical CCR course that the whole purpose was to learn to take full advantage of the unit's abilities and operating modes and to stay on the unit what ever possible, to both preserve gas and keep your options open. SCR, operating it as an O2 rebreather (when...

Correct me if I am wrong (I've never taken a "recreational" CCR course) but goals in a 3 day recreational CCR class are primarily to learn to recognize when there is a problem and to bail out to OC, while the goals in a 5 day technical CCR class is recognize when there is a problem, diagnose the...

That's how it should be. I have a mCCR and I use the comparison between the SA computer and the wired computer actually reading the cells to grade how well I maintain the planned set points. As long as I make the switch from low to high set point at about the same time I bump the PPO2 up to...

The N is only 11 at this point but the distribution is very bi-modal. I suspect it may reflect those you had training in SCR mode, and those who had training and actually practice it now and then.

That's the mid production MK 5. The early ones had 2 LP ports and the later ones had a 5 port turret like the Mk 10. The change in number of HP ports and the change in sizes came along more or less at the same time as the LP port turret changes.

I don't have a graph per se, but I can show you the results from a recent test of my current sensors. I have 3 sensors, and 1 and 3 have been in service since May, while sensor 2 was placed in service in January. At a theoretical PPO2 of .8 (based on calibration of the cells at 1 bar...