I am the developer of an application for planning water/sea routes. The application is completely free and created for people, there is no commercial basis. If you're interested, you can download it on Github.
https://github.com/YachtPlanner/MarineMasterPro/releases/tag/release-v1.0.0
GitHub
Release a MarineMaster Pro - a simple route planner for yachts, boats, etc.
TIPS FOR START:
Click "Update Sea Objects Database"
Set the Yacht configuration
Set the Departure/Destination ...