Check out this site ---->
https://activecaptain.com/X.php <---- been using for my sailing info --- BUT --- can be used for any boating / fishing or any water activity. Have boat launches / marinas w/ph#s / bridge info / waterway aproaches & markers / etc.... etc.... Whats good about site you can update a marker or add one if not there or move it if not located correctly. Which I did with the Cypremort Yacht Club (moved it 8 buildings over to the end of bayview) which they updated now.
ALSO ----> check out
http://marinetraffic.com/ais/default.aspx?level0=100
Ya'll have a good day & save some fish / crabs for me.