Caution - Gross Navigation Error Cause
The ++++ Aviation Gulfstream G-4 (N++++) aircraft was en route from Nassau (MYNN) to Farnborough England (EGLF). While cleared to 45N 050W deviated north of track by 25 miles. The pilot confirmed the INS showed on course but Gander ACC corrected their course to 50W. Three other aircraft, a Swedish military G4 and two other US registered aircraft a G200 and GLF4 were all involved in similar events at the same location 050W. The two G4 crews reported that the FMS flight their plan entries 5050"N" were incorrectly entered as "N"5050. Apparently, this misplacement of the "N" caused the Gross Navigational Error.