
NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: sextant without paper charts
From: R B Emerson
Date: 2008 Nov 4, 12:39 -0800
From: R B Emerson
Date: 2008 Nov 4, 12:39 -0800
FYI, here's the NYT take on the QE2 grounding: http://query.nytimes.com/gst/fullpage.html?res=9E0CEEDA153FF937A2575BC0A964958260 Cheers, Rick On Nov 3, 7:47 pm, Lu Abelwrote: > Peter Fogg wrote: > > Lu continues: > > Consider then the crudeness of our charting capabilities. Satellites > > can't spot stuff below the water like they can above the water. Side > > scan sonar is great -- if you've got the time and money to scan the > > ocean a few hundred yards at a swath. Bottom line: we really don't > > know what's out there in the great oceans. > > > Response: > > Although this is changing, at least in our waters. Australia claims a > > vast swathe of underwater territory (in the guise of 'economic > > interest') and has set about charting this realm in a systematic way. > > All sorts of interesting things are bobbing to the surface .. of our > > understanding. > > There's more than that, too. It's one thing to slash the bottom of the > QE II, quite another to do it to the bottom of an oil tanker or to an > LNG tanker. On more and more charts, I'm seeing symbols for channels > where commercial ships operate having been swept for obstacles by drags, > rather than merely having been scanned with sonar. It's interesting to > look at the chart for that particular region -- whilst there's one tiny > region where surveys date back a century, most of the shallower areas > transited by commercial ships have been charted with side-scan sonar > since the QE II incident. > > If anyone wants to take a look for him/herself, here's the image of the > chart: http://www.charts.noaa.gov/OnLineViewer/13218.shtml > > There are a westward running string of islands eminating in the > northeastern corner of the chart, off the western tip of the westernmost > island is Sow and Pigs Reef, the QE II was sailing just south of that > and I rather suspect some of the shallower rocks are recent discoveries. > > We have people from all around the world on this list and since I gave a > weblink above, I'd like to mention that all charts of the US are > available for on-line viewing. Starting point ishttp://www.nauticalcharts.noaa.gov/mcd/OnLineViewer.html --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To unsubscribe, email NavList-unsubscribe@fer3.com -~----------~----~----~----~------~----~------~--~---