Mag, Grid & True North Align
Ecce Homo! Loquitur...
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Mag, Grid & True North Align
Magnetic north, true north and grid north align over Great Britain for the first time in history.
Our calculations have discovered the three 'norths' will combine for the first time in history this week🧭
True north, magnetic north and grid north will combine at a single point - starting at Langton Matravers, a village just west of Swanage
https://www.ordnancesurvey.co.uk/new...PnhKNGR2fvNN_o
Our calculations have discovered the three 'norths' will combine for the first time in history this week🧭
True north, magnetic north and grid north will combine at a single point - starting at Langton Matravers, a village just west of Swanage
https://www.ordnancesurvey.co.uk/new...PnhKNGR2fvNN_o
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I remember being informed at a morning brief that due to the reduction in magnetic variation, Waddington's runway was no longer "two one" but "two zero": a co-pilot put up his hand and asked if the other end was still zero three.
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Bring back the LightWeightNavAid from the AH1 Gazelle so we can use it without doing Grivation calculations........
well magnetic North has been moving somewhat faster than usual recently I understand
of course we're also getting closer to the point when the earth's field will flip and North becomes south - "it's grim up South " doesn't have the same ring to it
The significance of 2W is that it is the central meridian (?) of the particular transverse Mercator projection used by OSGB. That is why TN and OS GN coincide along that line.
Last edited by Timelord; 4th Nov 2022 at 11:19.
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Just hold the chart upside down….easy.
Heathrow’s runway alignment
With the ever changing magnetic North does this mean that at any time in the near future we will see 27R and 27L revert to 28R and 28L? I remember it changing sometime in the 1970s and surely with the ever changing magnetic North it should change back at some point.
Ecce Homo! Loquitur...
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With the proliferation of GPS/PNR equipment, and the weakening and variability of Mag, at what stage will everything switch to True at all levels rather than just the upper air?
Its been a joke for years at places such as Goose Bay to watch FJs fly the approach patterns 30+ degrees out till nudged….
kinda like the QFE/QNH thing….
Its been a joke for years at places such as Goose Bay to watch FJs fly the approach patterns 30+ degrees out till nudged….
kinda like the QFE/QNH thing….
With the ever changing magnetic North does this mean that at any time in the near future we will see 27R and 27L revert to 28R and 28L? I remember it changing sometime in the 1970s and surely with the ever changing magnetic North it should change back at some point.
Hat, coat !
Last edited by Senior Pilot; 6th Nov 2022 at 07:38. Reason: Fix quote
Down here in the Antipodes variation varies between 18 to 25E, the isogonals lying roughly east-west across NZ. During my time as an instrument flight procedure designer we had to change runway designators on a number of occasions.