Jammer.

This is coolbert:

If nothing else a grave violation of diplomatic protocol!

An effort at meaconing? False navigation signals.

 Deliberate and malicious. Downright dangerous!

"Russia ‘jams signals’ on RAF plane carrying Grant Shapps"

"The electronic attack happened when the defense secretary, who has accused Putin of ‘saber-rattling’, was flying back from Poland, where he had watched a Nato exercise"

From the Telegraph | Larisa Brown | March 14 2024. 

"Russia is believed to have jammed the satellite signal on an RAF aircraft carrying Grant Shapps back from Poland, in a 'wildly irresponsible' act of electronic warfare."

"The GPS signal was interfered with for about 30 minutes while the jet flew close to the Russian territory of Kaliningrad on the Baltic Sea. Mobile phones could no longer connect to the Internet and the aircraft was forced to use alternative methods to determine its location."

"Meaconing: Meaconing is the interception and rebroadcast of navigation signals. These signals are rebroadcast on the received frequency, typically with power higher than the original signal, to confuse . . . navigation. Consequently, aircraft or ground stations are given inaccurate bearings."

I am not absolutely sure about this but at the exact moment Grant Shapps would have been traveling with diplomatic status. Even an indirect effort to obstruct the movement of Shapps would constitute a contravention of diplomat protocol.

coolbert.