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 https://cimg9.ibsrv.net/gimg/pprune....7551190f2.jpeg |
True N and Grid N don’t change do they, so I presume they have always coincided at that village?
True equals Mag, Local equals Zulu. What a day to be a navigator! |
So the 'add for mag, get rid for grid' beloved of hillwalkers etc becomes redundant?
|
Originally Posted by Timelord
(Post 11325078)
True N and Grid N don’t change do they, so I presume they have always coincided at that village?
|
Don't tell the BBC: they will start to blame it on Global Warming.
|
Ruddy Brexit
|
Is there an equivalent situation 180 degrees removed, eg the southern hemisphere?
|
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.
|
Originally Posted by SRFred
(Post 11325254)
Is there an equivalent situation 180 degrees removed, eg the southern hemisphere?
|
Bring back the LightWeightNavAid from the AH1 Gazelle so we can use it without doing Grivation calculations........
|
Originally Posted by Wensleydale
(Post 11325197)
Don't tell the BBC: they will start to blame it on Global Warming.
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 |
Originally Posted by Wensleydale
(Post 11325256)
Same as the Northern Hemisphere: along the 2W line - because compasses always point to magnetic north.
|
Originally Posted by Asturias56
(Post 11325263)
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 |
Originally Posted by Asturias56
(Post 11325263)
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 |
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.
|
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…. |
Originally Posted by 63000 Triple Zilch
(Post 11325535)
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.
|
Originally Posted by Wensleydale
(Post 11325255)
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.
Hat, coat ! |
Anyone ?
|
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.
|
All times are GMT. The time now is 01:09. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.