This is actually normal.
Transponders and tracking switch off only when leaving controlled airspace (airports etc). All of them are civilian helicopters, the majority of them are departing from Aberdeen International Airport, a civilian airport, and all of them are bound for the North Sea.
And in the North Sea, there are a shit load of oil rigs, 184 of them:
https://www.statista.com/statistics/279100/number-of-offshore-rigs-worldwide-by-region/
If you do an image search for North Sea oil rigs and you might find photos of a dozen oil rigs lined up in a single area. It wouldn't surprise me if helicopter traffic is frequent (think of a bus, train or ferry timetable) and by the minute for this reason.
It's now about 9am-10am in the North Sea so this is morning peak-hour traffic.
This is actually normal.
Transponders and tracking seem to switch off only when leaving controlled airspace (airports etc). All of them are civilian helicopters, the majority of them are departing from Aberdeen International Airport, a civilian airport, and all of them are bound for the North Sea.
And in the North Sea, there are a shit load of oil rigs, 184 of them:
https://www.statista.com/statistics/279100/number-of-offshore-rigs-worldwide-by-region/
If you do an image search for North Sea oil rigs and you might find photos of a dozen oil rigs lined up in a single area. It wouldn't surprise me if helicopter traffic is frequent (think of a bus, train or ferry timetable) and by the minute for this reason.
It's now about 9am-10am in the North Sea so this is morning peak-hour traffic.
This is probably normal.
Transponders and tracking seem to switch off when leaving controlled airspace (airports etc). All of them are civilian helicopters, the majority of them are departing from Aberdeen International Airport, a civilian airport, and all of them are bound for the North Sea.
And in the North Sea, there are a shit load of oil rigs, 184 of them:
https://www.statista.com/statistics/279100/number-of-offshore-rigs-worldwide-by-region/
If you do an image search for North Sea oil rigs and you might find photos of a dozen oil rigs lined up in a single area. It wouldn't surprise me if helicopter traffic is frequent (think of a bus, train or ferry timetable) and by the minute for this reason.
It's now about 9am-10am in the North Sea so this is morning peak-hour traffic.
This is probably normal.
Transponders and tracking seem to switch off when leaving controlled airspace (airports etc). All of them are civilian helicopters, the majority of them are departing from Aberdeen International Airport, a civilian airport, and all of them are bound for the North Sea.
And in the North Sea, there are a shit load of oil rigs, 184 of them:
https://www.statista.com/statistics/279100/number-of-offshore-rigs-worldwide-by-region/
Do an image search for North Sea oil rigs and you might find photos of a dozen oil rigs lined up in a single area. It wouldn't surprise me if helicopter traffic is frequent (think of a bus, train or ferry timetable) and by the minute for this reason.
It's now about 9am-10am in the North Sea so this is morning peak-hour traffic.