Its noticed that some ECS programs offer 3D bathymetric map. Does NavPak?
At this time, there is very little data available. Some data is available for the coast of the US, but the resolution is low. This data is available at low cost from US government sources, but it is not directly useable as is. The bathymetric charts which are available from commercial sources, are based on government data which is interpolated to increase the apparent resolution, and converted into a proprietary format. When this technology comes of age NavPak will be incorporating 3D bathymetric data capabilities, directly readable from public domain sources.