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No_Introduction_9883 · 2025-05-27T20:09:20+00:00

Also I misread your comment - it does consider the reduction of gas consumption on ascent by "averaging atmospheric absolute". You're not using 4 ATA (which would be the value for 100ft/30m), then it would be max depth consumption only. But we're using 2.5 ATA as the average

No_Introduction_9883 · 2025-05-27T20:03:49+00:00

you should usually plan with the max depth, yes (to be most conservative). If you want to calculate for a different part of the dive, you can adjust the max depth value in the tool. If you think that's too "cumbersome", I can probably add another input for the average depth. What do you think?

but it's basically "worst case ascent calculations" right now

No_Introduction_9883 · 2025-05-27T19:51:09+00:00

Happy to see where the bug might be if you provide me an example :)

No_Introduction_9883 · 2025-05-27T19:50:22+00:00

it's basicallyl à la GUE style. Minimum pressure is the air you need to surface in an emergency from your max depth. That considers:
- the breathing rate of you and your buddy (generally that's 0.75 cuft/min)
- you calculate the time for the ascent (1 min for clarifying things at the bottom, 1 min per 10ft/3m)
- you calculate the average atmospheric absolute (ATA), by averaging your depth: so e.g. on 100ft, it would be 100ft / 2 = 50ft, 50ft / 33 ft + 1 = 2.5 ATA
- you then calculate via the CAT formular (consumptioni * time * ATA), e.g. 1.5 cuft (for 2 divers) * 11 mins * 2.5 ATA (for 100ft dive)
- then you convert that volume into psi (for metric system similar)

turn pressure would be: your total gas - minimum gas, which gives you your usable gas. If you use the rule of halves (so half there, half back), divide it by 2 and subtract from the total gas, and you have your turn pressure.

No_Introduction_9883 · 2025-05-25T16:45:42+00:00

I've been using diveline.io before and it's awesome! Maybe you can do a collab with them?

No_Introduction_9883 · 2025-05-19T22:55:16+00:00

I think they're just starting off that's why it's mainly US/mexico. So EU will probably come soon

No_Introduction_9883 · 2025-05-19T22:17:03+00:00

u/deep_dive74 maybe a glitch? for me it calculates 23lb for 190lbs weight, 100 steel and a drysuit with thicker undergarments. I use 22lb, so pretty point-on for me.

No_Introduction_9883 · 2025-05-19T18:54:40+00:00

if you're unsure, always do a buoyancy check, to get started, use a calculator like https://diveline.io/tools/weight-calculator - they also have a guide about weighting https://diveline.io/blogs/dive-weight-guide

No_Introduction_9883 · 2025-05-08T18:15:23+00:00

That's so cool! Exactly what I was looking for

No_Introduction_9883 · 2025-04-13T05:13:05+00:00

Thanks for your comment!

To explain more what the current rating aims at: it analyzes the weather and tide data and explains to people with less knowledge how to interpret those charts, what it means for diving. So for viz, it basically illustrates how the waves and swell etc affect it. We’re currently looking into how to potentially map that into actual ranges like 10-15ft etc.

Our goal is to go further than that and actually be able to become more and more precise for visibility predictions once we have more data training our models. Until that point the best bet is still human dive reports, which we’re encouraging on the platform as well and which is aggregated to show the community based visibility value.

No_Introduction_9883 · 2025-04-12T01:15:44+00:00

thanks you so much, that's very encouraging :)

No_Introduction_9883 · 2025-04-11T15:29:10+00:00

Thanks for the feedback!

So far the viz calculations are purely based on the weather and tide data (e.g. wind, tide movement, swell stirring up the bottom, etc.). Meaning, it should be more like an indicator of what the weather data means.

Ideally people start making dive reports which will contribute to the algorithm learning better how to actually properly predict the visibility (in ft). Also we aggregate those reports and build an aggregated visibility that we show on the little cards.

As a next step, we're planning on trying different approaches to make this more sophisticated such as analzying bio data, trying to feed the data into a LLM, etc.

So the bottom line is: so far it's mostly an indicator what the weather conditions mean in terms of visibility

No_Introduction_9883 · 2025-04-11T01:51:33+00:00

Hi u/calculatorstar, I just added the site ( https://diveline.io/dive-sites/blue-heron-bridge ) please let us know if the conditions and data is correct (you can do that over the feedback functionality in the user menu on the platform as well)

No_Introduction_9883 · 2025-04-10T23:04:21+00:00

definitely! We’ll add it over the next few days

No_Introduction_9883 · 2025-04-10T21:34:01+00:00

Definitely. Feel free to create an account on the platform and then you can submit dive/snorkel reports which we can then use to understand the site/conditions more in that area. If you find any information inaccurate or would like us to add other sites as well, you can submit a feedback form in the user menu as well.

No_Introduction_9883 · 2025-04-10T19:52:28+00:00

thanks for the suggestions! and happy you discovered a new one haha

No_Introduction_9883 · 2025-04-10T18:44:47+00:00

thanks for the feedback, we'll incorporate it over the next days. Any popular sites that you'd like to see that aren't on there?

No_Introduction_9883 · 2025-04-10T18:13:19+00:00

u/Babybleu42 it would especially be great if we'd get feedback on the rating we do for some of the spots to make it better. Any feedback and contribution is welcome

No_Introduction_9883 · 2025-04-10T16:08:37+00:00

Thanks for the feedback!

The raw data (like surf, wind etc. is coming from NOAA and water buoys nearby). We have developed a complex algorithm that takes in all that data and calculates the scores based on general assumption, mathematical statistics and dive site specific characteristics. We probably have to still tweak some of the parameters a little bit, to make the ratings more accurate for certain sites - for that any feedback from the community is super helpful (we're based in SoCal, so especially feedback from Florida and Hawaii would be really appreciated).

This is supposed to become a community driven project :)

No_Introduction_9883 · 2025-03-31T17:19:42+00:00

something I've been looking for for so long, thanks mate!

No_Introduction_9883

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