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Descend via the nearest pole

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Old 14th Mar 2024, 18:07
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RMC
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Descend via the nearest pole

Is this only applicable to contingencies in the Northern Hemisphere (South ascend North descend - SAND) Should we descend towards the South pole in the Southern Hemisphere?
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Old 14th Mar 2024, 19:58
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Originally Posted by RMC
Is this only applicable to contingencies in the Northern Hemisphere (South ascend North descend - SAND) Should we descend towards the South pole in the Southern Hemisphere?
Just follow the tropopause.

Gets higher towards the equator and lower towards the poles -> climb if turning towards the equator, descend if turning towards the poles.
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Old 14th Mar 2024, 20:22
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Who's descending down whose pole?
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Old 14th Mar 2024, 20:47
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I don't understand the question...
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Old 14th Mar 2024, 21:36
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Should be weather deviation in oceanic airspace > contingency.
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Old 16th Mar 2024, 01:54
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Just follow the tropopause.!!!!
Wrong and dangerous advice……
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Old 20th Mar 2024, 08:50
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I'm guessing... garbled acceleration errors on a direct reading compass? see PPRuNe
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Old 20th Mar 2024, 11:50
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Deviations from track when in the North Atlantic Track System?

https://skybrary.aero/articles/north...ns-contingency

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Old 20th Mar 2024, 12:08
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aha! Thank you. Severe wx avoidance without clearance deviating more than 5 NM from track. The SAND acronym got me.
​​​​​​​
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Old 21st Mar 2024, 11:16
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Originally Posted by Rusty1
Just follow the tropopause.!!!!
Wrong and dangerous advice……
Great. Why?
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Old 21st Mar 2024, 13:52
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Because it does not work in the Southern Hemisphere nor South of the equator.
The ICAO weather deviation procedure is for all worldwide oceanic airspace not just NAT HLA.
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Old 21st Mar 2024, 18:18
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Originally Posted by Rusty1
Because it does not work in the Southern Hemisphere nor South of the equator.
The ICAO weather deviation procedure is for all worldwide oceanic airspace not just NAT HLA.
No, it does not indeed but we are all very much aware that this -like many others- is just a mnemonic rule of thumb which could, by the way, become unusable tomorrow morning if procedures change even in the Northern Hemisphere. No need to get excited, people still look at their contingencies for different airspaces before thinking about acronyms.
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