#diving things

Clearly interrupting this big guy’s check up at the dentist 🦷🪥

And where else would I be? 😌

Yes, this is what happens to your voice when there’s no Nitrox filter on… or maybe I’m just that happy about his lil’ teethies 🥹

Ah, mate, you’re talking my kind of playground! Personally, I’m more of a Trimix guy for most deep dives but it totally depends.

For example, at 60 metres, I’m using 21/35 Trimix. That means 21% oxygen, 35% helium, and the rest nitrogen. Keeps your oxygen low enough to avoid toxicity at depth, cuts down nitrogen narcosis, and helium makes breathing easier. If I’m pushing past 90 meters, we’re talking 18/45 or even 15/55. Oxygen drops, helium climbs, nitrogen drops off almost entirely. At that depth, narcosis from nitrogen would be brutal if we didn’t swap it out, so in comes your Heliox.

So Trimix, for your average dive, is safer, it’s more forgiving, and you don’t feel like your head’s going to explode when you hit fifty meters. If I’m having to swim someone through a decompression, I use Trimix for them too as much as I can. It’s a little kinder on someone who isn’t used to how it feels to deep dive. Heliox can make your dive tables a nightmare if you’re not careful too, because you off gas so differently. Helium diffuses in and out of tissues a lot more quickly than nitrogen, your muscles hang on to it for longer than other parts of your body, and you need to know what you’re doing or you’re going to be in big trouble very quickly.

But Four is capable of providing all, so it makes my life a lot easier. She can blend based on depth, she can switch without my input if I’m working off the umbilical on an EVA, and she keeps an eye on my tissue saturation for me through my suit. My deep water exo-suit also has both options and blends (remotely from Four) although obviously it’s got a more limited supply. Four’s also got an onboard decompression chamber so if we’re in real trouble, we can bail to her and stave off the bends.

As for the helium squeaks on the radio - yeah, that chipmunk voice is a classic. I stick to full-face mask mics with a built-in scrambler, means the electronics do all the heavy lifting. Otherwise, you sound like Alvin and the Chipmunks under the sea, and nobody wants that during a tricky salvage or rescue. You can also speak a bit slower and deeper, but the scrambler’s your best friend.

Lotsa times 😌 sometimes deliberately, sometimes just as passersby.

Sharks are incredible. Obviously every breed and every shark can be so different, but they’re jaw dropping creatures to get to be in the presence of. Super intelligent, super strong and with all that cool, calm swagger.

Favourite way to see them in a chain suit dive (with a group, don’t go alone!). These are Carribean reef sharks, last year!

If your name is Scott Tracy, don’t look at the teefles below…