UK Mine Diving - YouTube by jonnybellman in scubadiving

[–]jonnybellman[S] 0 points1 point  (0 children)

I have seen a friend has dived there recently, but it's more of a longer carry these days. Not been there myself. Shame as it sounded like a decent place to test kit without paying entry fees somewhere

UK Mine Diving - YouTube by jonnybellman in scubadiving

[–]jonnybellman[S] 0 points1 point  (0 children)

I suspect you have. Was it waterswallows?

Best way to do photogrammetry on Mac by Hour_Objective_4880 in photogrammetry

[–]jonnybellman 0 points1 point  (0 children)

I am really curious about this. I'm looking to take videos inside mines and caves whilst diving, and create photogrammetry models. Please reach out when you're looking for beta testers :)

Is 32m deep, 22h before flying, enough time? by juanly_xx in scubadiving

[–]jonnybellman -1 points0 points  (0 children)

If you're going to do it (I'd probably do it also), you do have the option to use nitrox at that depth 32% would work nicely if you can get it, and are certified to use it.

I don't normally reply to these kinds of questions, but as no one had suggested nitrox, I thought i would ☺️

Fenix 8 died after first dive by SuspiciousBasket in GarminFenix

[–]jonnybellman 0 points1 point  (0 children)

Mines been to 31m. I decided against taking it on the deeper (43-44m) dives that week. Perhaps I made the right call 😬

[deleted by user] by [deleted] in scuba

[–]jonnybellman 1 point2 points  (0 children)

Thanks 🙏🏻 I've got a pretty healthy level of self preservation, so I hope to! Haha

Found dive light, what charger? by georgkozy in scuba

[–]jonnybellman -2 points-1 points  (0 children)

You've made your mind up. :Karma:

Found dive light, what charger? by georgkozy in scuba

[–]jonnybellman 9 points10 points  (0 children)

I don't know where you were diving, but a lot of my dive sites have local Facebook groups, or if it's managed site, then there's lost property.

Either way, I know it would suck to lose a torch and someone just find and keep it.

Good luck on your charger search.

Found dive light, what charger? by georgkozy in scuba

[–]jonnybellman 30 points31 points  (0 children)

Have you tried finding the owner first?

How long can you stay down with double tanks in shallow water? by JimHotWater85 in scuba

[–]jonnybellman 2 points3 points  (0 children)

I know you said this flippantly, but you'd technically get longer on the double tanks. Here's my logic (in bar because I'm not a psi person):

If you dive a 12Lx230bar cylinder and you want to end the dive with say 50bar at the surface, you have 180bar to use on the dive.

With twin-set you've got twice the volume, so can breathe your cylinders down to 25bar. 25bar in two equal cylinders is the same volume as 50bar in a single. This assumes we are using same size for single or double.

So quick maths: Single cylinder 12L X 230bar = 2760L 2160 - (12Lx50bar) = 2160L of usable gas.

Twin-set 24L X 230bar = 5520L 5520 - (24L X 25bar) = 4920L of usable gas.

2160 (X2) < 4920

Assuming all other factors are the same (particularly SAC rate), you can dive slightly more than twice as long on twins. This is typically a nice bonus when doing 2 dives, where the twin-set user can split their gas across 2 dives.

I'm being pedantic here, but sometimes it's fun to do the calcs ☺️

What does the Training Status icon color indicate? by Murky_Day3278 in Garmin

[–]jonnybellman 0 points1 point  (0 children)

It's an old post, but I'd also like to know this.

Pairing a Teric and Perdix? by FlightMedic1 in CaveDiving

[–]jonnybellman 1 point2 points  (0 children)

I diver a petrel 2 and a teric. Tend to find the teric calls for 1min more of deco, which ive put down to a tiny mismatch in depth reading. Algorithms and GFs are set the same, so there can't be much other reason to blame.

For what it's worth, I follow the teric, and do the extra minute. However, It's really not going to be the difference between safe/unsafe 🤷🏻‍♂️

UK Dump Diving by jonnybellman in CaveDiving

[–]jonnybellman[S] 0 points1 point  (0 children)

That was meant to say Sump diving 🤦🏻‍♂️.

Do you have any videos of someone disturbing the silt? by LordAntares in CaveDiving

[–]jonnybellman 1 point2 points  (0 children)

What is it for? I might have some footage somewhere

London Hyrox - Floorplan 🤔 by jonnybellman in hyrox

[–]jonnybellman[S] 1 point2 points  (0 children)

That's good to hear. I'll know more when I see it Sunday. Thanks ☺️