That list is in my eyes just crap when it comes to extended types, as
any of those lines / points / polygons will only be shown if defined in
typfile, and many others if defined too. I only don't know whether there
are any regions that will not be shown, or only shown in Mapsource.
My etrex shows at least some of them.
I don't think any 3-byte POI is shown in search, but maybe wrong on this....
You're wrong because some of the marine pois show up.
I don't use a typfile (so just guessing) but why can't you use one to
define whatever is needed for stuff with extended types?
Of course I can and will use one....