TM  1-1520-240-10            3-3-21 all waypoints are put in a list and the start and end way- points are entered. Both sequence modes can be flown in the order they are in the list or in reverse order. Direc- tions will be displayed to the waypoint next on the list until approximately  10  seconds  before  overflying  the  way- point at which time the display will advance to the next waypoint and the new waypoint number will blink for ten seconds. One consecutive and one random sequence may be stored in the system. 3-3-48.  To-To Route Mode. The system has the ability to provide steering information onto a course defined by the start and end waypoints. Only the second waypoint will be overflown. The distance displayed is the distance to the course when outside 2 nautical miles of the course and the distance to the sec- ond waypoint when inside 2 nautical miles of the course. 3-3-49.  General Operating Procedures for Entering Data. The panel display consists of four line LCD readout. The top line of the display is reserved for the display of Fly-To- destination number and destination name/International Civil Aeronautic Organization (ICAO) identifier, EPE in meters, mode of GPS and mode of AN/ASN-128B opera- tion and target store number. The remaining lines will display data in accordance with the DISPLAY and MODE switches. When depressing the KYBD key for the first time in an entry procedure, the display freezes, kybd is displayed in the bottom right corner indicating the display is in the keyboard mode and the input field under key- board control blinks. If it is not desired to change the display field under control, the pilot can advance to the next  field  of  the  display  by  depressing  the  KYBD  key again. Depressing ENT key (whether or not new data has been entered) causes the display to blank momentarily and  return  with  the  latest  computed  data.  To  abort  a keyboard operation, move the mode or display switch to another position. NOTE All keys activate upon release after being de- pressed. Keys should be depressed and im- mediately released in one continuous motion. a.  Data Entry. To display a letter, first depress the LTR key corresponding to the position of the desired letter on a key. Then depress the key which contains the desired letter. For example, to enter an L, first depress The LTR RIGHT key, then depress the 4 key. b.  Keyboard Correction Capability. The last charac- ter entered may be cleared by depressing the CLR key. If the CLR key is depressed twice in succession, the field is cleared but remains under control (indicated by blink- ing) and the last valid data entered is displayed. c.  Destination  Variation  Constraint.  The  magnetic variation associated with a destination must be entered AFTER the coordinates for that destination are entered. The order of entry for present position is irrelevant. d.  Impossibility  of  Entering  Unacceptable  Data.  In most cases the computer program will reject unaccept- able data (for example, a MGRS area W1 does not exists and will be rejected). If the operator attempts to insert unacceptable data, the unacceptable data will be dis- played on the panel and then the selected field will blink after ENT key is pressed displaying the last valid data. NOTE The computer cannot prevent insertion of er- roneous data resulting, for example, from hu- man or map errors. e.  Procedure for Displaying Wind Speed and Direc- tion. NOTE In MGRS mode, wind speed is displayed in km/hr; in LAT/LONG mode, wind speed is dis- played in knots. Wind direction is defined as the direction from which the wind originates. (1) Set  MODE  switch  to  LAT/LONG  (MGRS may also be used). (2) Set  DISPLAY  switch  to  WIND–UTC/DATA and observe display. (3) The display indicates: SP;XXXKn DIR:XXX_ f.  Procedure for Displaying/Entering UTC and Dis- playing GPS Status. (1) Set  MODE  switch  to  LAT/LONG  (MGRS may also be used). (2) Set  DISPLAY  switch  to  WIND-UTC/DATA and observe the wind speed/direction display. (3) Depress  ENT  key.  Observe  that  the  CDU display indicates year XX, day XXX and indicates hours, minutes, and seconds of UTC time: XX Hours, XX Min- utes, XX Seconds. (4) To  enter  year,  day,  and  time  depress  the KYBD key to select the field for input shown as a blinking field, enter the desired data and depress the ENT key. (5) To display GPS status depress the ENT to display selection menu. 1>SEA CURRENT 2>SURFACE WIND 3>GPS STATUS 4>DATA LOAD end (6) To select the GPS STATUS page depress the 3 key.