On Mon, 30 Nov 2009 09:08:52 -0500, Wayne.B
wrote:

On Mon, 30 Nov 2009 06:21:43 -0600, Rick Morel
wrote:

I wonder how many chart displacements are the result of these changes
that simply haven't been recently surveyed? Back to our home port
area, the charts still show a little island that washed away back in
the mid 70's!

We have a lot of chart "features" like that here in SW Florida. The
approach to Marco Island is one example. Coconut Island has been
completely gone for some time and a GPS track for the channel takes
you right over the top of it. A GPS track coming out Red Fish Pass
north of Captiva Island goes over dry land also. Fortunately the nav
aids for both of those places are accurately set because anyone
following the chart will get in trouble.

I've got (if I haven't misplaced it) a chart of some of the islands in
the S. Pacific with the notation "based on the survey by HMS Beagle,
1776", or some such wording. I wonder does the coordinates agree with
GPS?

Cheers,

Bruce
(bruceinbangkokatgmaildotcom)