"Glenn Ashmore" wrote in message
news:mgwGd.21097$EG1.17828@lakeread04...
http://www.goupstate.com/apps/pbcs.d...60/1051/NEWS01

Not that any of us will be cruising at 30 knots 500 feet below the surface
but navigating soly by GPS you are just as blind. Many of the charts we
use
are from surveys over 100 years old.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com



What do you recommend instead of GPS Glenn? Postulate a mountain top three
feet below the water surface. Not charted. I doubt that inertial or
celestial would offer any protection. Face it...every once in the while the
Gods **** on our pillar.

Jim Donohue