Re: Declination/Magnetic Variation

Peter Clinch wrote:

Bottom line: remember from grid to mag, add, from mag to grid, rid.

Nice mnemonic! I've never really felt the need to fiddle around with the couple of degrees difference between mag North and grid North. I doubt whether you can take a bearing with a Silva type compass accurate to within 2 degrees anyway - to do any better you'd need a prismatic compass. As long as I'm carrying enough food and have shelter, I'm not particularly bothered with compass navigation. I've ended up in interesting places on the occasions when I've got lost! The last time this happened I was on the complex ridge system in the middle of Arran. The mist was coming and going and I hadn't a clue where I was on the map - even if I could be bothered to get it out and struggle with it in the wind! I just shrugged my shoulders and flogged on knowing I would get to the sea eventually - which is what happened. Mind you, it would have been a longer walk to the sea from the Cairngorms!

Jim Ford
.

Relevant Pages

  • Re: Declination/Magnetic Variation
    ... couple of degrees difference between mag North and grid North. ... My compass is a Silva with a sighting prism too, the 54 NL, though to be honest I don't use the sighting feature much. ...
    (uk.rec.walking)
  • Re: Declination/Magnetic Variation
    ... I've never been a big fan of mnemonics personally, I *usually* find if I can ... couple of degrees difference between mag North and grid North. ... within 2 degrees anyway - to do any better you'd need a prismatic compass. ... it would have been a longer walk to the sea ...
    (uk.rec.walking)
  • Re: 1507 text ref of Inventio Fortunata
    ... Michael Zalar wrote in message ... ... >compass rapidly spread..." ... "Also mariners traversing the sea, ... compass for precise navigation at sea, because the latitude measurement is ...
    (sci.archaeology)
  • Re: FA: RAY JEFFERSON 630 RADIO DIRECTION FINDING RADIO>Cheep
    ... >It says its handy for being lost at sea. ... I hear ya' on the compass. ... 73's - Graham ...
    (rec.radio.cb)
  • Re: 1507 text ref of Inventio Fortunata
    ... I was referring to the functioning (sea) compass. ... Silk Road and not by sea on the "standard" trading route from China to ... Arabs seem to have learned of the compass from the Europeans. ...
    (sci.archaeology)