TM 1-1520-240-103-3-29Figure 3-3-8. Graphic Definition of Course TermsMETHOD 1When flying shortest distance to destination frompresent position, set DISPLAY switch to DIS/BRG/TIME position and steer vehicle to bearing dis-played. As an aid to maintaining course, set DIS-PLAY switch to XTK/TKE position and steeraircraft to keep track angle error (TKE) nominallyzero. If the display indicates a L (left) TKE, theaircraft must be flown to the left to zero the error.METHOD 2When flying a ground track, set DISPLAY switchto XTK/TKE position. Steer vehicle to obtain zerofor crosstrack error (XTK). If XTK is left (L), aircraftis to right of the desired course and must be flownto the left to regain the initial course.NOTESince the aircraft has the Horizontal SituationIndicator (HSI) and when the Doppler hasbeen selected then the pilot may use the “#1”needle and course deviation indicator (CDI)for navigation to the Fly-To destination se-lected on the CDU.Select CDI by depressing, then releasing the DPLR GPSlens on the HSI Mode Select PAnel.c. Procedure to Enter Route-Sequence To-To ModeThe Doppler/GPS navigation set has the capability tonavigate a course set up between to destinations.As an example, consider navigation onto a course start-ing from destination number 62 and ending at destinationnumber 45.(1)Set MODE switch to MGRS (LAT/LONGmay also be used).(2)Set DISPLAY switch to DATUM/ROUTE.(3)Depress the ENT key. Observe that a menuof special steering functions appears.
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