I think there is a need for the ability to record depth
along with the standard GPX data. This could be done as an extension like humming bird does:
<wpt lat="58.876224" lon="011.194387">
[However the units should be meters not cm.]
Why? Well boats that can record depth
remotely along with position could contribute to a bythymetric database like this project
NOAA started but abandoned: ARGUS Beta Testing
and more impressively check out their sample dataset in action: ARGUS Solution Sets
A public database could be setup so people could download this bathymetric data to OpenCPN
(or others) and turn on the public depth layer for more information.
I've touched on this idea in an earlier thread about imgkap, but after more research
I found this Argus project
to really help illustrate the power of my point.
Could something like this be accomplished via a plug-in or is the NMEA/GPX data not accessible?