A diver's worst enemy isn't sharks—it's murky water. According to Hacker News, a developer launched Submarius, a dashboard that predicts water clarity using satellite data. Divers call it 'viz,' and it's critical to the diving experience. The technical challenge: training a state-augmented ensemble Kalman filter on messy satellite imagery, where clouds look like turbid water and shallow reefs distort the readings. The creator is asking the community: is there a better approach?

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