The Black Helicopters Are On A Chart You Can Buy For £14
Military low-level training routes are published, numbered and mapped. We plotted eleven months of reader sighting reports against them. Eighty-one per cent fell within two kilometres of a published route, and the rest are the interesting part.
A months-long reporting project. Documents cited below are held in The Vault and available to readers.
ITHACA, N.Y. — The routes are published.
Military low-level training corridors are printed on aeronautical charts, numbered, with their widths drawn. A chart costs about fourteen pounds and any pilot shop will sell you one.
We plotted eleven months of reader sighting reports on top of them.
What the overlay shows
Two hundred and fourteen reports. One hundred and seventy-three of them — 81 per cent — fell within two kilometres of a published corridor.
Where the corridor turns, the reports turn.
That is not a subtle statistical finding. It is a picture, and it is the picture in the diagram above.
The clusters that did not fit
Two, and they are the reason this was worth doing.
Nineteen reports clustered eight kilometres south of any route, mostly between 22:00 and 04:00. One telephone call to a regional hospital's flight service: night patient transfers, a helipad, a fixed approach from the south.
Twenty-two more sat in a line to the north-east that matched nothing. Second call: a utility contractor running a survey under a tender that is published on the county's own website.
Both took one call. Neither had been made by anybody before us, including by this desk, which had been receiving these reports for eleven months before it thought to buy a chart.
The nine
Nine reports we could not place at all.
They are in the published data, flagged, and they are staying there. Rounding nine unexplained reports into a 96-per-cent success rate would have been easy and would have been the same crime this desk accuses everybody else of.
What we wrote to the readers
All 214 people who sent a report were written back to individually, which took our correspondent three weekends and which he would like recorded as the least enjoyable part of the exercise.
The letter said the same thing to everybody: here is the chart, here is the route nearest you, here is your report on it, and here is what to do if it does not fit.
Forty-one wrote back. Most said some version of oh. Four sent better reports the following month, with times and bearings, because they now knew what would be useful.
One wrote a sentence this desk has pinned up: "You could have told us about the chart at any point in the last eleven months."
He is right. It cost fourteen pounds.
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Three stories a morning, in your inbox before the coffee is made.
Sources & Method
Log every reader report with date, time, place and description. Buy the published route charts. Plot one against the other. Then telephone somebody about every cluster that does not fit, which took four calls and resolved two of them.
Who we spoke to
- Published low-level route charts, Commercially available aeronautical charts. Bought at the ordinary price and plotted 2026 £14. Any pilot shop. Routes are numbered and their corridors are drawn.
- 214 readers, Who sent sighting reports. Reports logged with date, time, place and description Sept 2025 – Jul 2026 All 214 were written back to individually, which took our correspondent three weekends.
- A regional hospital's flight service, Named in our notes. Telephone June 2026 Confirmed night transfer volumes matching one off-route cluster.
- A utility contractor, Named in our notes. Telephone; supplied its published survey tender June 2026
Documents
- PX-2041 — 214 reader sighting reports plotted against published low-level route charts accepted
What we could not confirm
- Nine reports we could not place. They are in the published data, flagged, and we would rather print nine unexplained than round them away.
- Whether the routes are always flown as charted. They are corridors, not lines, and traffic within them is not published in advance.
How Others Covered This
The same events, as reported elsewhere on the same day. We list what each outlet had that we did not, as well as what we had that they did not — including where we come off worse. Why we print this.
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The Hollow PostUNMARKED HELICOPTERS OVER RURAL AMERICA
Collected sighting reports and did not open a chart.
Had that we did not
Nothing.
Left out
The chart, which costs £14 and is sold to any pilot.
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They Buriedthis newspaperThe Black Helicopters Are On A Chart You Can Buy For £14
Plotted the reports against the published routes.
Had that we did not
The overlay, and the two off-route clusters resolved.
Left out
Our readers sent these reports in good faith and our headline is a little pleased with itself at their expense. — V. Ashcombe-Doyle, standards editor
How was this story?
We publish the result, whatever it is. Reader verdicts appear on the front page and in our newsroom metrics.
Readers' Letters 0
Printed at once under the name you give and read by the desk afterwards; anything unfit is removed, with a note saying so, and nothing else is ever deleted — only corrected. Letters that changed something in the story carry a mark saying so, and there are 5 of those across the archive.