NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: DR plotting techniques
From: Rodney Myrvaagnes
Date: 2003 Oct 17, 13:46 -0500
From: Rodney Myrvaagnes
Date: 2003 Oct 17, 13:46 -0500
On Fri, 17 Oct 2003 10:16:41 -0700, Royer, Doug wrote: >OUTSTANDING George!!! You just answered what was to be my next question(and >ultimate goal)after this question was tabulated.You are the 1st to say you >correct your charts!!I know that was not in the original question but Bully >on you! >Part of my duties were to correct all the charts,and log all corrections in >the ships log,as required. > I did not discuss this point, but perhaps should have. From about 1984 to the mid 1990s, we faithfully updated charts from printouts generated by the Automated Notice to Mariners system of the US Hydrographic Office. This was relatively easy because it was a text-based direct-dial modem (or SSB for those at sea) and I could write a script that I could start with a keystroke and ignore while it took down corrections sorted by chart number. Before that we used the paper Local Notices. These were not as convenient, because each correction was printed once, with a list of chart numbers following. SInce the world-wide web became universal, just getting the updates is a manual hassle. I have been much sloppier. We have gotten away with this because of the GPS, which lets us identify renumbered ATONs by location. If anyone knows a way to automate the current system, I hope s/he will post it. Rodney Myrvaagnes J36 Opinionated old geezer Eagles may soar, but weasels don't get sucked into jet engines.