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(Mod edit) Shearwater, lovely looking computer, but not my colors. I like black and stainless steel.

A decade is period of 10 years, it’s not defined as starting on any certain year. Every year will be the start of a new decade.

Just my size, pm sent!

I’ve used true nato straps on my Perdix, they fit perfectly. I prefer them for warm water diving on my bare arm, but switch back to bungee straps for dry or wetsuit diving.

I’m curios who wouldn’t I know Midwest Scuba does cascade fills for O2 and pretty sure Y-Kiki does. If either one of them won’t I do know a rebreather diver with his own booster.

Thanks for your posts Dr. Bill, I considered Marine biology for a while but decided to direct my studies to humans and I’m working on a nursing degree. You’re posts are still interesting to me, and gives me something new to discuss with my biology professor. If she doesn’t already know about...

No problem at all with the Deep6 regs, I know quite a few people using them for tech diving and specifically in caves. If you ask in the Deep6 forum, you’re likely to get replies by the owner and employees of Deep6 that tech dive with them on a regular basis. Personally I own a single tank set I...

Not sure on weight, but the following thread goes over some of the technical differences. Scribble Series 1st Stage Edit: maybe not as much as I thought, however they do talk about service classes.

I think there may be a misunderstanding, using my method you simply push the mouthpiece back through the loop to secure it. This page shows both methods. rectotec: HOW TO: TIE A REGULATOR NECKLACE

If you pull the bungee necklace over your head I would just be cautious that you don't pull your mask off too. You could rig it so you can simply pull the regulator out of the bungee leaving the bungee around your neck. I've seen two common ways to rig the bungee. Some like to zip tie the...

I use only AI on my BM doubles. I treat it just like an spg and deal with failures accordingly. With that said I have yet to experience a transmitter failure in hundreds of dives. I have experienced failures of the spg via spool o-rings and inaccurate readings.

I addressed this, then deleted it, quite frankly cause I don’t want to get into it. Now I see post saying people should be taught on the bottom and not neutral. The quoted post saying the skill is useless and the second bullet point of the quote addressing simple physics that have already been...

With integrated weights you would likely be positive and with a weight belt you will likely be negative without your kit. As a unit (diver and kit) you should be neutral. If you let go of the bcd, you fail the skill. You should not be “hanging” from the bcd, it’s life support, so keep it close...

That wouldn't fly for me, I require my students to have both arms free of the BCD. I also require the skill done neutrally buoyant. I did just peek in the Instructor Manual and Guide to teaching and it does not state both arms need to be removed, but the CD that did my training says you...

I've always got bottle of O2 on the boat or shore, I consider it part of my first aid kit at any dive site for any type of diving. If everyone has a bottle of O2, even better, but that will not keep me from bringing additional myself.

If you’re talking just internally, the pressure on the outside of the isolater vs the inside is different and therefore the pressure on each side of the o-rings is different. Some o-rings are designed and lubed to move while under pressure, I’m not sure that isolater o-rings are. If they aren’t...

In Cozumel I’ve been very happy with ScubaClub, nice shore site, good food, great employees, and I can walk around everywhere in a wetsuit.

Everyone was using an SMB as it was a training dive, gives everyone plenty of practice over the week. As for the buoyancy of the divers in the video, I won't comment. they're not me and that was not the class I was in.

It worked very well, it also gets the DSMB up before we're too far off the wreck so the boat can spot and follow with ease. We did deco on an anchor line for a dive or two in current, and I much prefer drifting deco.

I can tell you from first hand experience that it is not an emergency procedure, it's simply an ascent line for drifting deco. We prepared our DSMB as we left the wreck because the timeline allows for it then and we don't have to mess with it while switching gases or needing to head to our next...