Late in the movie, 'M' is being held captive by Electra King. She manages to activate a Russian warhead tracking device that she had smuggled into the cell. Bond and company pick up the signal at a radio listening post. Bond makes the comment "It's GPS coordinates". Wrong! The tracking device came off a Russian warhead. Therefore it would not rely on the USA GPS system. Instead it would have used the Russian equivelent, Glonass.