Return-Path: Received: (qmail 21344 invoked from network); 5 Dec 2000 22:15:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 22:15:02 -0000 Received: (qmail 23878 invoked from network); 5 Dec 2000 22:10:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 22:10:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143QBY-0001RY-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 22:03:40 +0000 Received: from email.cwcom.net ([195.44.0.150] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143QBW-0001RT-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 22:03:39 +0000 Received: from computer ([195.44.203.234]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Tue, 5 Dec 2000 22:04:52 +0000 Message-ID: <009801c05f09$de347ca0$30ce2cc3@computer> From: "Martin" To: rsgb_lf_group@blacksheep.org References: <34.dc13cb7.275ea431@aol.com> <5hlq2t8vijfc13vl8pa8d9v6perjj4t8kb@4ax.com> Subject: LF: mf beacons for shipping Date: Tue, 5 Dec 2000 22:22:02 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: As a keen yachtsman I am interested in comments made about direction finding beacons. To the best of my knowledge there are no operational beacons for shipping use in UK or adjacent waters. In fact it is a long time since I have seen a DF loop on a boat although some boats retain the receivers mainly to listen to shipping forecasts on 198khz. GPS has taken over as the primary radio position fixing method. Till recently the GPS satellite signal available for non military use was degraded so that the fix would be plus or minus 100m. To overcome this differential GPS was developed, sighting a GPS receiver at a known location and broadcasting the error. A receiver then feeds this error signal to the GPS on the boat which gives a correction to plus or minus 10m. Recently the error has been removed from the GPS signal which will makes this system redundant. I have copied the UK beacons out of Macmillan's Almanac uk differential beacons Khz 293.5 St Catherines Point 284.0 Lizard 299.0 Nash point 305.0 Point Lynas 294.0 Butt of Lewis 304.0 Sumburgh 311.0 Gridle Ness 302.5 Flambourgh Head 310.5 North Foreland If anyone is really excited about this I will copy out the page and post it somewhere! Martin M5CIX