Did anybody specified on the map the things like inlets, bays, straits and capes? Any example of how to correctly specify them and how they are rendered? Did not found much of suitable ones in the map features especially ones that are rendered.
Mapping the sea is an area that OSM must improve on. I’m not surprised you found only little information so far. There is a thread on the mailinglist about this subject though: http://www.nabble.com/Mapping-the-sea-td22409474.html