[Kozmik1]

Making CarPlay for boats would not be so hard, but making Waze for recreational boats might be. But if you have ideas on that and are sure you can avoid directing people into deadly obstacles, considering all sea and weather conditions, in all kinds of boats, give it a go!

[balp]

All commercial plotters have autorouting. There is automatic wind routing for sailing in OpenCPN (as a plugin). I'm not sure that adding it to a phone with carplay is a viable option. If you have a display to show it on, it's probably a display for a plotter with all the functionality, including map updates over the internet.

Thou for entertainment it's an other side, that would be useful.