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We used a 12volt a/c clutch off of a car for the pto on both washdown pumps and hydraulic pumps for the compressor. Belt off the flywheel freewheels on the clutch pulley unless the clutch is energized. About a $100. On my personal boat I did direct drive off a 10 hp Yanmar. Rough estimate is...

Sub bottom profiler, low frequency so it will penetrate. Technology is at least 60 yrs old. Depending on the pwer, depth and frequency they can reach far more than 4 feet.

Take it back n the water with you. Better yet, have it handed down to you. Breathing off a hose or a tank hung from the from the boat is stupid. Especially a small one. If you have any issues with current or waves it will be a total Charlie Foxtrot. We kept an 80 ready at all times as we were...

Only regs I have ever seen fail underwater personally were both Poseidon. None I've dove breathed as well as my G250s or TUSAs. So that is a hard no for me.

I have dove a very remote reef regularly once or twice a year for quite a while. Season closed early December. Instead of 4 to 5 skittish grouper, there were 30 in my face as I tried to find lions, scamp and hogs. I know it was the front end of the migration but I was amazed at how they seemed...

After figuring the fuel burn on main engines even at a high idle I opted for a separate diesel engine for my boat's compressor. The previous boats I'd worked on used hydraulic pumps driven by the main engine. One real disadvantage was not being able to shift when pumping tanks, we had to...

Catch and release isn't a particularly ethical use of a fishery for several reasons but in particular release mortality so I wouldn't claim any moral superiority if I were a strict catch and release fisherman vs. a strictly meat fisherman. No is culling legal fish to get the best specimen...

Discarding value and sticking to the criteria you asked for. Interesting and improve you as a diver. Certainly enjoyment is purely subjective. I enjoy killing and eating animals, some people enjoy navigating difficult wreck or cave penetrations or counting sea shells. In order of potential...

They will always be WKRP to me. Les, Johnny, Venus, Herb and crew.

It was obscure, and of course I never saved it. I'll look around and report back. I started looking back when the WKRP guys were running down 80% and 32% primarily to confirm the assertion that nitrogen metabolized somehow into nitric acid and that caused coagulation and subsequently...

Yeah, I just don't think there is anything other than anecdotal evidence. Oxtox is not high on the causal scale for incidents involving the OPs parameters. Human error is probably 90+% Agencies have previously used 2.0 and 1.6 with 1.4 for working dives and I don't recall divers falling...

Never even heard of someone toxing out on a recreational dive much less seen it. Never seen anyone tox on a deco dive even on hot mixes, riding high P02 up on a RB and decoing on 02. I do know of people dying on the wrong mix deep but they were well in excess of 3.0 by the time they hit depth.

I found it useful. Supervised tri-mix, deco and nitrox blends I dove myself. How to use testers, boosters, compressors and banks. How to to bend and assemble banks and panels and make fill whips. My instructor became a dive buddy and was one of the most proficient and knowledgeable divers...

Roughly lionfish pain. But it can also get infected easier being a bigger hole and a bottom dweller. Dive ender and a couple of hours of nauseating pain.

Nope, nopity and no chance. SSI is the new PADI. Glad to to have ditched them both years ago. It's no wonder people switch agencies and have little loyalty to shops anymore.

I used 2 inch clear hi temp hose and ran it into my pilothouse and kept the front windows open most of the time.

I like a bigger diameter remote intake hose and try to have a barrier such a wall or bulkhead between the engine and the intake. New drive motors are pretty cheap if that one is cranky.

Prehydration prevents dehydration. Since this is advanced and not tech I'm going to assume the scope of diving does not include 6 hours of decompression per day.

In defense of happy, Tracy, wookie and iain and a couple others. While occasionally short, these guys provide more valuable content on scuba compressors than the rest of the internet combined. I am amazed at how much more mature and kind they are in the face of repeated "questions" and...

Not a cave but certainly one of the cooler dives in FL Devil's Den Spring - Scuba Diving Florida, Snorkeling, Scuba Diving Certification