Location
Off the east coast of England, near Norfolk and Lincolnshire.
Participants
Plans
KerrMcF
On my trip to Warsaw, I would take two flights and pass through Amsterdam airport. Although I had no idea whether or not I would pass through a point (and no way of checking live as the GPS on my phone is unavailable in flight mode), I was aware that it was a possibility and planned to check after the flight by comparing the route to the point.
Expedition
KerrMcF
It turns out that I did pass through the point at approximately 18:16 UTC, the proof of which is shown below (flight path + point, boarding pass). Other than a 24-minute delay (very short compared to my 110-minute delay from Amsterdam back to Glasgow), there wasn't anything worth mentioning. I was seated next to a window, so there is a chance that I glanced at the point itself when passing over it, however, I was likely instead playing some nonogram game to pass the time. I'm unsure whether it is impressive or ironic that despite having no control over my route, this is the first non-retro geohash I have been able to do in 2.5 months.
Photos
Simplified view of crossing the point
Miscellaneous information at the point
Achievements
Speed Racer has been claimed by others via this kind of geohash and as such I am also doing so: