On Thu, 08 Jul 2010 06:39:02 -0700, John Navas
wrote:

There is a long and noble tradition of crowd-sourced surveys here. I
have a set of Clyde Cruising Club sketch charts which were put
together over decades from the contributions of hundreds of yachtsmen.
They remain by far the most detailed information available in many
places.

Otherwise known as Russian Roulette. No thanks.

It is easy to take the position that *all* charting should be done to
state-of-the-art, professional standards. There are many parts of
the world where that is not going to happen however, certainly not in
our life time, probably not ever.

What is your solution for cruising those areas?