NavList:

   

Reply

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.

-----Original Message-----
From: Navigation Mailing List
[mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM] On Behalf Of Rodney
Myrvaagnes
Sent: Friday, October 17, 2003 14:46
To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
Subject: Re: DR plotting techniques


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.

   

Reply