Navy Using New UConn Software to Improve Navigation
today.uconn.edu
today.uconn.edu
[0] http://www.opencpn.org [1] http://meltemus.com/index.php/en/
[0] http://www.oceanweatherservices.com/featured_blog_posts/abou...
https://www.fastseas.com/ is a neat web app that even has an API. Just set start and finish, hit route and you get an optimized route for your sailboats characteristics.
Expecting a software tool to "guarantee" safe travel seems like having way too much confidence in that tool.