Technical Divers – Multi-Stage | Drysuit – 20 min

Steve Martin8 Comments

8 Comments on “Technical Divers – Multi-Stage | Drysuit – 20 min”

  1. Ron Breines

    Hi Steve and Vas. Excellent video on all counts! One tip, I teach my students (both rec. and tech.) to ride the smb like a horse, with the dump and fill valves at the top so they have full control of both valves. I too dive drysuits most of the year, but in summer here in a tropical climate, it’s too hot. So I like my students to become proficient with this smb technique. I dove twin lp85’s and a stage in a wetsuit with no wing down to around 30 meters and was able to use the smb to get back to the surface. It was not difficult, and as you have said, it’s better to use aluminum tanks with wetsuits, but yes, it is very possible to make it to the surface, with stops, with just an smb even with steel lps. I used a 4′ smb, whereas a 6′ smb would have worked even better, though a bit more bulky to carry.

  2. Delyan Popov

    Awesome video and a smooth demo by Vas Proud, looks so deceptively easy. Will there be a follow up on drysuit flooding, while carrying 4 tanks? Maybe that would justify those “20 kg of BCD lift”, even for a correctly weighted diver. Cheers

  3. Vas Proud

    Hi Delyan,

    Thanks for your feedback on the video 🙂

    For the flooding, then I’ve not tried it (would need to be warm water!) – but the water entering the suit doesn’t affect bouyancy as water is neutrally bouyant. What could happen is gas escaping from the suit if there was a rip / tear etc. – so now you might have less lift – but you are now talking about a failed BCD/wing AND a failed suit – so fairly unlucky / unlikely. The dry suit rip would need to be at the highest part of the body and not keep any gas in the suit – so I don’t see it being so likely. You would still have the volume of the undergarments providing some lift. I’d hopefully have an SMB and my fins to kick up as well.

    I would look to ditch a tank if I really had to and could not ascend any other way.

    I’d also need to be solo diving to have no assistance 😉

    How does that sound – please let me know what you think. Cheers.

  4. Delyan Popov

    Hi Vas and thank you for your detailed answer. It sounds really logical and well thought of.
    I was not referring to a double drysuit/bcd failure (very unlikely indeed), but rather to (just) a ripped drysuit that can’t hold gas at all (worst case scenario obviously). Would a smaller bladder (let’s say 13 kg lift) be able to cope with the weight of 4 full tanks plus the lead supposed to offset the drysuit buoyancy in the beginning of the dive? Voilà, I hope it makes more sense now 😀

    1. Steve Martin

      Hi Marcel, The oral inflator part is only available from an Apeks / Aqualung dealer, show them the picture below and they should be able to order you it as a spare part. You will have to grind the bevels off so it will fit inside the tube. Regards, Steve

      Aqualung / Apeks Oral Inflator Part

  5. Brock Morrell

    I’ve always thought of my drysuit as my redundancy and if that failed, I could use my smb but this video has certainly caused me to think a little.

    Agreed a lot of things would have to go wrong at the same time but it does make me wonder if I should consider upgrading my wing (XDeep Stealth 2.0 Tec) to one with the redundant wing. If I did that, I believe it comes with a complete second LPI which I believe best practise is to leave the low pressure hose disconnected and only fill orally if needed.

    Assuming that a wing with redundant bladder comes with a complete 2nd LPI assembly, what are your thoughts? Should I stay with existing single bladder wing and consider adding separate bladder inside the existing wing with an oral inflation like the one that Vas used? Would love to hear your thoughts. Thanks.

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