CrayCray
CrayCray is an iPhone app that tells shore divers when and where it’s worth going looking for crayfish.
The best reef is usually the reef that’s rarely calm enough to dive, which is also why it still has crays on it. CrayCray finds reef within a swim of the shore from the seabed LiDAR survey, then scores each site for every daylight hour of the coming week from the swell, wind, tide and visibility forecasts. The score runs from 0 to 10, and the app shows what’s holding it back.
What it does:
- Craydar picks out the next good dive, the best day this week, and any rarely-diveable reef that’s on.
- Week shows each day and part of the day, and where to go, best first.
- Map shows the sites worth diving at that time on satellite imagery, with the reef patches and entry points.
- Each site gets a verdict (“Go Sunday 09:00–13:00”), the conditions, and the factors pulling its score down, in plain words.
- Scores are shown on a single blue scale, darker for better diving, so they read fine for the colourblind.
A high score means “probably pleasant and productive”, not “safe”. The ocean hasn’t read the app, so look at the water before you get in. Marine parks, closures, and bag and size limits are up to you.
Can I have it?
Probably not. CrayCray is a private beta for a few friends and isn’t on the App Store: a public map of where the crays are is a good way to make sure there aren’t any.
If you’re a keen diver who doesn’t live near me and you’d like to build it for your own stretch of coast, email me and I’ll send you the source code. You’ll need a Mac and some patience with seabed data.
Support
Privacy
See the CrayCray privacy policy. In short: no accounts, no ads, no tracking, and your location stays on your phone.
