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Show HN: Submarius – Global water clarity for divers

Hacker News Saturday 20 June 2026, 23:29 UTC By celloer 1 min read
Key Points

Submarius started as just a dashboard for diving conditions, but I quickly realized that there is simply no API for water clarity, nor even a simple way to calculate it. Divers call it viz, and it is one of the most consequential factors for a diving experience. So I dove the viz rabbit-hole.

Submarius started as just a dashboard for diving conditions, but I quickly realized that there is simply no API for water clarity, nor even a simple way to calculate it. Divers call it viz, and it is one of the most consequential factors for a diving experience. So I dove the viz rabbit-hole. I landed on a state-augmented ensemble kalman filter. More details on the /clarity page. My question for the HN audience is if anyone knows of a better way of doing this? There is a ton of satellite data to train on, but a lot of it is messy (clouds read as turbid water, shallow reefs reflect abnormally causing bad readings, etc). Appreciate any feedback on the subject. Enjoy the read!

Comments URL: https://news.ycombinator.com/item?id=48614062

Points: 4

# Comments: 0

Submarius (PERSON) API (ORG) kalman (ORG) https://news.ycombinator.com/item?id=48614062 Points (PERSON)
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