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I heard waypoint ALVIN is a candidate https://mastodon.social/@Edent/111017144236825037 https://mastodon.social/@Edent/111017144236825037 https://opennav.com/

I heard waypoint ALVIN is a candidate https://mastodon.social/@Edent/111017144236825037 https://mastodon.social/@Edent/111017144236825037 https://opennav.com/waypoint/US/ALVIN https://opennav.com/waypoint/US/ALVIN https://opennav.com/waypoint/UK/ALVIN https://opennav.com/waypoint/UK/ALVIN But this suggests not (as one of those ALVINs is inside the UK): > Although there has been work by ICAO and other bodies to eradicate non-unique waypoint names there are duplicates around the world. In order to avoid confusion latest standards state that such identical designators should be geographically widely spaced. In this specific event, both of the waypoints were located outside of the UK, one towards the beginning of the route and one towards the end; approximately 4000 nautical miles apart https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident%20Investigation%20Preliminary%20Report.pdf https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident...

bloak 3y ago
> such identical designators should be geographically widely spaced Yes, though I wouldn't normally regard "4,000nm" (mentioned in the article) as widely spaced in geographical terms. Unless they meant nautical miles (which should be abbreviated as M, NM, Nm or nmi according to en.wiktionary.org) rather than nanometres. OK, perhaps that comment wasn't really worth making ... On the other hand, perhaps next year we'll read about some other system (aviation or silicon design) collapsing because the software mixed up nanometres and nautical miles.
- SideburnsOfDoom 3y ago
  I think in "approximately 4000 nautical miles apart", as I quoted above, the "nautical miles" means ... nautical miles? IDK what else to say to make it clearer. Bottom of page 8 of this article that i was referring to here https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident%20Investigation%20Preliminary%20Report.pdf https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident...

bloak 3y ago

> such identical designators should be geographically widely spaced Yes, though I wouldn't normally regard "4,000nm" (mentioned in the article) as widely spaced in geographical terms. Unless they meant nautical miles (which should be abbreviated as M, NM, Nm or nmi according to en.wiktionary.org) rather than nanometres. OK, perhaps that comment wasn't really worth making ... On the other hand, perhaps next year we'll read about some other system (aviation or silicon design) collapsing because the software mixed up nanometres and nautical miles.

SideburnsOfDoom 3y ago
I think in "approximately 4000 nautical miles apart", as I quoted above, the "nautical miles" means ... nautical miles? IDK what else to say to make it clearer. Bottom of page 8 of this article that i was referring to here https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident%20Investigation%20Preliminary%20Report.pdf https://publicapps.caa.co.uk/docs/33/NERL%20Major%20Incident...