Maxsea "under the radar" is in common use in the cruising community. It is however quite unstable and wont run with a 64bit processor. The CMap charts "under the radar" are very good.
I just infuriates me to think that in "doing the right thing" and
purchasing genuine charts for our chart plotter at great expense, our
navigation system is unusable in many of the charted areas.
The most popular cruising ground in
Asia would be Phang Nga Bay East of Phuket. You could not go into that area using Navnet 3 D Navionics charts.
Another concern with the Navnet system is chart
ownership. The charts are unlocked into a dedicated system. They cannot be transferred. If the system fails you loose all your charts with it.
We have decided to cut our losses and buy another Plotter with cards which are interchangeable and which can be
sold and exchanged with other cruisers.
It will just become an expensive radar!!