Factual error: In the scene where HMS Devonshire is allegedly being sent off course because of spurious GPS signals, a brief space shot shows a CMGN communications satellite orbiting close to a GPS satellite. The CMGN satellite would need to be in geo-stationary orbit. The GPS satellites are in quite different polar orbits, much closer to earth. Moreover, GPS position-fixing requires data from several satellites, not just one. The alleged interference could not be made in this way.
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