2018-01-31 43 19
Half way between and 11.5 km above Krnjača and Jabuka, Serbia, flying at around 800 km/h. Thanks, Ryanair - you nailed this one.
All my journeys by air seek the Air_geohash_achievement. The 10 arc second rule means you need to be under 310 metres from the hashpoint. My napkin aproximath suggests there's a 0.5% chance of meeting this goal crossing one graticule. On a mid length flight you might cross 50 graticules so now there's a 25% chance of success. Frequent flyers will certainly succeed.
I had programmed the decimal parts of the coordinates into my Garmin eTrex 20. Every 10 to 15 minutes I re-programmed the graticule coordinates and watched the distances fall and rise again. In 43,19 the distance was dropping rapidly and after each screen update I was grabbing the image. The best screen shot was at 123 metres from the hashpoint, well within the requirements.
A bit of post-processing in Google Earth confirmed the result.
The eTrex 20 lacks a barometric altimeter so you get true altitude in an aircraft and not the cabin pressure altitude.
| Sourcerer earned the Air geohash achievement
Commercial flights travel as fast as they are permitted by air traffic control or by the air frame limits.
| Sourcerer earned the Speed racer achievement
| Sourcerer earned the Border geohash achievement
| Sourcerer earned the Juggernaut achievement
| Sourcerer earned the Public transport geohash achievement
| Sourcerer earned the Multihash Achievement
| Sourcerer earned the Last double-man standing achievement
|Sourcerer earned the Virgin Graticule Achievement|
Did Sourcerer drag along the other 180 passengers and crew on the flight?
Expeditions and Plans
|Prijepolje, Serbia||Sourcerer||Half way between and 11.5 km above Krnjača and Jabuka, Serbia, flying at ar...|
|Norwich, United Kingdom||Sourcerer||A field perimeter footpath at Rumburgh, Suffolk UK.|
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