I have used C-Map on Furuno
NavNet3D in the Near Bahamas, Berry's, and Exumas
over the last few years. Just returned and the latest C-Map was 100% correct in the shallow areas* everywhere we were (GeorgeTown and north). Garmin
BlueChart on the iPad
was the same correctness, and that same warning is out about Garmin
Of course, reading the water
is the safest way to navigate the shallows in the Bahamas, use the chart only as a guide.
FWIW, I can't imagine Monte (Explorer Charts) has sounded all of the Bahamas, so even his books
must have data from others.
* - if you are into fishing
at the edges (like Exuma Sound), many times, the charts would show <100' of water
and my fishfinder/depth sounder was showing 750', as an example. Hence, fishing
the dropoffs, pay attention to your instruments.