NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: DR plotting techniques
From: George Huxtable
Date: 2003 Oct 18, 00:13 +0100
From: George Huxtable
Date: 2003 Oct 18, 00:13 +0100
Doug Royer said- >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. >In the last year most of the vessels I've gone aboard on don't and by the >looks of their paper and electronic charts most likely have never done this >important task. Doug, my wife would be most indignant to read that! I didn't claim that I corrected my charts, I said that she did. And most efficiently too, if I may say so. If it was left to me, I probably wouldn't bother. I should add that not every correction actually gets made, on our charts. Sometimes things change that are clearly irrelevant to small craft, and then they are just ignored: except that the correction number is always entered in the margin, to maintain the link in the chain of corrections. Stacy Hanna said- >Actually getting the corrections off of the web is easier than ever. For >US notice to mariners the website is >http://pollux.nss.nima.mil/index/index.html and for British Admiralty >notices use http://www.nmwebsearch.com/ . The US website is currently >down while they work on it but will probably be back up later this >afternoon. Both websites let you search for corrections by chartnumber >so you only have >to pull up the ones you actually need. I still get weekly Admiralty Notices to Mariners posted to me. These used to be free (you just paid postage). Now they cost ?2 (about $3) a time, plus postage, which has also got more expensive, as they are now so expansive, big and heavy, lots of wasted space.. I have tried using the Admiralty nmwebsearch site instead of weekly notices, but have given up on that. One problem is my slow dialup connection at 14 kilobaud which I should do something about anyway. But there's a bigger problem, and I'm not sure how others overcome it. It's this. Over the course of a week, usually there will be corrections arising for only, say 4 charts out of the 80 or so that I hold. But to find that out, I need to go into a dialogue with the website 80 times, effectively asking for each- "Has there been an amendment to chart A?": "Has there been an amendment to chart B?": and so on, for 80 charts. Most of the time, the answer will be "No". It just isn't efficient or acceptable. What is needed is the ability to download to the Admiralty a list of the 80 charts that I own, which they can then hold, although I should be able to request changes to that list when I buy new ones or retire old ones. And then, I could just ask "Please download all amendments to any charts in the list that you hold in my name, since week xx". Then, they would all come in one go. Perhaps this can be done, but if so I haven't discovered how. George. ================================================================ contact George Huxtable by email at george@huxtable.u-net.com, by phone at 01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. ================================================================