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Same point as in Post #3 about the AL80 being buoyant which you already acknowledged in Post #9. :wink:

Steve Bogaerts only uses AI for all his diving on CCR and SM, including exploration dives. He discusses some of the issues already brought up in this thread in his post.

Are you sure about this? Isn't the ETOPS Limitation on Dual Maintenance rule to never overhaul/check/maintain both engines at the same time at the same location? To prevent the exact problem you are describing?

Just wanted to re-post what someone else had posted about Steve Bogaerts having switched to just using transmitters instead of analog SPGs for all his diving (both CCR and SM): Steve Bogaerts

I would not replace the Lifeline with a PLB, I would add the PLB. You want to have an escalation policy which has the PLB as the final step, when all the other signaling devices have failed.

The expiration date of your Avios points is with BA's Executive Club and not tied with your Chase credit card. My recommendation would be to charge $1 on the card to refresh the Executive Club account date and then move to a no annual fee Chase card for that account. You will then have 36 months...

Is this the Super BIG DAM? If yes, not sure how doable that will be to inflate underwater unless you are shooting it from very deep. I was recently in Cozumel with my GUE instructor for some fun dives and we settled on both of us needing to participate to launch the Super Slim DAM from 30 ft...

IMHO, by far the easiest way to check if there is any leak problem prior to splashing is to: assemble all the gear open the valve to pressurize the system fully close the valve, note the SPG reading keep an eye or stand near your gear to make sure no one purges or otherwise disturbs it wait...

That is GFs at work. See Post #79 and Post #101.

Wowzers! I do hope that @BDinSH still uploads since the perspective would be from the other side and much closer/clearer.

You cannot go wrong with a Shearwater. The Petrel 2 does everything you would ever need, the only downside would be it's size. I would not overly worry about AI right now unless you get a Perdix AI/Teric for a crazy price like you got the Cobalts. You don't need to get a transmitter to start...

As @chillyinCanada said, you know plenty! The biggest issue with the Cobalts is not the algorithm or the ability to handle helium, but the fact they are consoles. Tech diving requires accurate buoyancy control during the entire dive, but especially when ascending. The only way to do that...

Bulletproof checked bags are great, but very heavy. Your Pelican Air 1615 is 14.06 lbs (6.4 kg) without foam. That would be 28% of a typical 50 lbs / 23 kg bag weight limit. I wouldn't want to allocate that much weight to the bag, and would prefer something like Cargo Hauler Wheeled Duffel 130L...

You cannot upload it directly to ScubaBoard, but you could upload it to YouTube and then link. If you don't want to use YouTube, Streamable - video for publishers works well and doesn't require an account for less than 10 min or 1GB files.

The only argument here is when to apply the CAT. Are you saying that in the US Military training, it is apply CAT for any arterial bleed on an extremity before trying pressure? Is it apply CAT before moving the injured person to a safe area?

Something like this can do wonders underneath a 5mm or 3mm wetsuit: WOMEN'S THERMOCLINE HOODED VEST - Fourth Element Shop Hooded Vest — Lavacore International Chillproof Vest with Hood - Womens The super nice thing is that you don't have to put the hood up and it disappears since it is not...

To reinforce the point, here is the Subsurface plan with GF 100/100. The scariest part of this is that with a SAC of 0.7 cuft/min, this dive would require 95 cuft!

@Bob DBF do you consider this NDL? It shows the same 30 min at 100ft.

Actually, lower vis (more material in the water) makes it easier to maintain buoyancy due to the visual reference. For fun sometimes, try and do an S-drill in 100+ ft visibility in blue water at 30 ft with no bottom. If you don't have a scan already built up that constantly glances at your...

It is NDL diving, check the depths and times with your favorite computer. The reason it is called MDL is that 1 min per 10ft is just the standard GUE deco ascent speed. So, in the spirit of "starting with the end in mind..." they teach even a newbie OW diver that ascent speed control and...