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With spontaneous recovery? A functional/psychological component is at the top of my list, after ruling out drugs, metabolic or neurological issues. Vagal or cardiovascular syncope generally involves much briefer loss of consciousness, and hypercapnia should resolve rapidly in a healthy...

This, plus 30 minutes loss of consciousness isn’t particularly compatible with orthostasis or a cardiocirculatory problem that doesn’t require CPR…

Just adding that somewhere between 15 and 25 of all people (and thus all divers) have a PFO. It’s a negligible risk factor until it’s not, ie until you have an event that may be related to said PFO and is not caused by something else (strokes being the primary reason for PFO closure in selected...

Cost is the biggie. A higher end setup will run more than the cost of the contents it houses once you’re done adding strobes, etc. New cost. Seafrogs and Ikelite are cheaper. Since the D750 is slightly older you may be able to find a deal on a used housing setup, try Wetpixel.

Nature of the beast indeed. And the bigger the sensor, the thinner the DoF for the same framing. Far as I know, none of the Song cams have usable automated focus stacking - which is shame, though probably unworkable underwater with flash.

The difference in IQ between m43 and a Sony RX100 series is quite a bit smaller than the sensor size alone would suggest. For one thing,the RX100 lens is a few stops brighter (wide angle) than the more affordable housed lenses (I.e. not the absolutely unique Oly 1.8 fisheye). The per pixel...

I'm purely a rec diver, half tank is a two-hander (100 bar), a fist is 50 bar, and we signal per 10 bar, so only 4 extra fingers needed (i.e. 120 bar is fist-fist-2 fingers, 80 bar is fist-3 fingers). Haven't felt a need for much more than that under water...

Does this help: http://www.frogkick.nl/files/apeks_maintanance_manual_xtx_second_stage_regulator_issue1.pdf? Page 5 onwards seems to have instructions on disassembly, step by step, with pictures. This one has slightly more detailed text...

Nope, I mean no wetsuit abrasion. Not any strap abrasion either, mind you - I don’t scooter around, so there’s just not that much tension on the crotch strap. Just enough to keep things in place.

There's nothing wrong with the X-Tek wing - I have a Tecline BP/W setup (polish company, solid quality stuff, good pricing), my wife has an X-Tek. I have a 15L, she has a 13L. Both of us have standard backplates with a DIR harness. The X-tek is perfectly good quality, solid, good stitching...

I think it also depends on where you are and what coverage you might need, and what kind of coverage other providers cover - my 'standard' (for NL) travel insurance covers emergency medevac world-wide, hyperbaric treatment, etc. on top of what my regular health insurance does not. So I don't see...

I have a soft 2" crotch strap. No relevant abrasion I can see.

4 lbs on the upper cam band, and another 4 or so in quick release pockets mounted to the waist strap webbing. May revise a bit once I get the Freedom Plate into the water...

Sorry, not buying it. Bone density is significantly higher than water density, and the degree of osteoporosis required to affect that would be significant, and accounts for about 14-15% of body weight in a non-overweight adult. Muscle sinks. Fat floats. Large lung capacity will make you...

Depends on how much gear you need to carry - I’m a big fan of F-Stop bags and their ICU (internal camera units) blocks. I have them in three sizes (older models), two of which are fully ‘carry on legal’. Weight is generally the issue, if anything. I actually use one ICU for camera stuff and the...

True, and a 30lb/13-15L wing and a backplate with a hog harness and a couple of weight pouches will cover almost any recreational diver’s needs without the need for upgrades. I’ve never dived doubles, and I’m not sure if I ever will. I will add a smaller wing to the mix but that’s because it’s...

The crotch strap and waist belt pull the plate down and in. The shoulder straps need not be particularly tight because of that, as the slack gets pulled out. I fit about a fist in on each side, and it’s rock solid no matter what my orientation is in the water.

Huh. Hoe is the capture holding up underwater? I’d guess the springs it has (at least my v1 and V2 have) for the thumbwheels and release catch) are spring steel, and will likely rust away merrily. Never would have thought to use it immersed, though it is a favorite on land. If it holds up well...

Maldives are (at least in part) open from what I’ve gathered, not sure if you can actually get there and away again (quarantine, flight availability, etc..)

It’s been a while for us (5 years), but if you can afford it do a liveabord. The day bit sites we hit the first day of the trip were not nearly as nice as the somewhat farther afield ribbon reefs...