The magnetic variation is taken into account in flight planning ( that is what is meant by magnetic heading) so the compass is still meant to be swung and accurate.
Mike > On 6 Jan 2015, at 4:48 pm, Peter Champness <plchampn...@gmail.com> wrote: > > Yes. understand. > > If the compass is within 10 degrees that is Ok for dead reckoning. Magnetic > variation is more than that here in Victoria. > >> On Tue, Jan 6, 2015 at 7:39 PM, Mark Barnfield <mb...@internode.on.net> >> wrote: >> What’s a compass? >> >> >> >> From: aus-soaring-boun...@lists.internode.on.net >> [mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of Tom & Jane >> Gilbert >> Sent: Tuesday, 6 January 2015 7:13 PM >> To: Discussion of issues relating to Soaring in Australia. >> Subject: Re: [Aus-soaring] Compass Swinging >> >> >> >> Hi Chris, >> >> >> >> There are a few methods but the easiest is as follows... >> >> >> >> 1. Using a master compass (a good bush walking compass will do) align the >> glider North South. (This should be done well away from any hangars with >> power on and instruments running) Using a non magnetic screwdriver, adjust >> the compass to North. >> >> 2. Align the glider to South using the master compass and halve the error. >> >> 3. Repeat in East West. >> >> 4. Align the glider to all the cardinal headings (ie, every 30 degrees) and >> record the indicated heading. >> >> 5. Complete the correction card. >> >> >> >> Using this method you should be able to get to within 2 degrees on every >> heading (not always but usually). >> >> >> >> Regards, >> >> >> >> Tom >> >> >> >> >> >> >> >> >> >> From: Chris Runeckles >> >> Sent: Tuesday, January 6, 2015 6:15 PM >> >> To: Discussion of issues relating to Soaring in Australia. >> >> Subject: [Aus-soaring] Compass Swinging >> >> >> >> Hi sailplane drivers. >> >> >> >> Has any one got a procedure for swinging glider compasses, or a link to a >> web article would be good? >> >> >> >> Many thanks >> >> >> >> Chris Runeckles >> >> _______________________________________________ >> Aus-soaring mailing list >> Aus-soaring@lists.internode.on.net >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2015.0.5577 / Virus Database: 4257/8877 - Release Date: 01/05/15 >> >> >> _______________________________________________ >> Aus-soaring mailing list >> Aus-soaring@lists.internode.on.net >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.internode.on.net > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring
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