Can somebody please explain why these seamarks (which can be seen on the edit screen) do not render on on the main map? Furthermore they do not render on the OpenSeaMap either. Lastly I would particularly like to find a way to get these seamarks into my Garmin GPS. I have been using http://garmin.openstreetmap.nl/ and evidently these seamarks are not supported in that rendition. thanks.

here is a pier on stilts that is rendering with water on inside.

Their is a floating string of buoys here to prevent boats from approaching the dam. not certain how to tag so that it will render in mapnik.

there is a culvert under this levee which allows the salt water to flow into the "lagoon." I am having a difficult time getting mapnik to render the tunnel/culvert tag properly. Can anybody offer any guidance. I have a suspicion that coastline can't be under ground. but what about seacaves and arches and holes in rock? It is something which ought to be allowed.

can somebody tell me why Hume Lake is not showing on map.