C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH FPL WAYPOINT DTK DIS ACTIVE FLIGHT PLAN VLOC 114.10 116.00 COM 119. 000 121.600 FPL W AYPOINT DTK DIS ACTIVE FLIGHT PLAN VLOC 114.10 116.00 COM 119. 000 121.600 W A Y P O I N T I N F O R M A T I O N TO ACCEPT PRESS   ENT SW USA SAN CARLOS SAN CARLOS CA KSQL _ L W122 FPL WAYPOINT DTK DIS ACTIVE FLIGHT PLAN VLOC 114.10 116.00 COM 119. 000 121.600 KSQL  KSQL Use the inner and outer knobs to enter the name  of the waypoint, then press the ENT button. The waypoint now appears in your flight route  and the FMS is ready to accept more waypoints. C ACTIV E FLI GHT P LAN 119 Engage cursor mode when the flight plan page is selected. Figure 3-9. Entering en route waypoints in the flight plan. Entering Airways Entering En Route Waypoints En Route Waypoints and Procedural Waypoints The Flight Planning Page Every FMS unit includes a page dedicated to entering a flight  plan. Typically, entering a flight plan is a simple matter of  “filling in the blanks”—entering the en route waypoints and  instrument procedures that make up the planned route. Entering a flight route into the FMS unit requires you to  enter the waypoints that define your route. FMS distinguish  between two kinds of waypoints: (1) waypoints that are  published, such as departure, arrival, or approach procedure  points; and (2) user defined waypoints. The approved system  software (the internal programming) allows the pilot to  manually enter airport and en route waypoints. However,  you are prohibited by the software from entering (or deleting)  individual waypoints that define a published instrument  procedure, since misspelling a procedural waypoint name or  deleting a procedural waypoint (e.g., final approach fix) could  have disastrous consequences. Any changes to the selected  database approach procedure will cancel the approach mode.  Changing to go direct to a waypoint will not, in most units,  cancel the approach mode (such as receiving radar vectors  to final and bypassing an intermediate fix). Looking at the planned route in  Figure 3-8,  it is apparent  that San Carlos airport (KSQL), and SUNOL and TRACY  intersections are not part of any instrument procedure that  pertains to the planned flight. These waypoints can be entered  into the unit, as shown in  Figure 3-9. The remaining waypoints in  Figure 3-8,  starting with the  initial approach fix at ECA, are part of the Oakdale GPS  approach procedure. Waypoints that are part of a published  instrument procedure are entered by a different technique  that will be introduced later. In some cases, you navigate  along an airway that contains a string of waypoints, such as  the one shown in  Figure 3-10. Pomona 073‑degree radial and the Twentynine Palms  254‑degree radial. For this airway segment, you could  enter POM, REANS, and TNP, keeping in mind that the  remaining waypoints do not appear in the programmed route. More sophisticated FMSs allow you to enter entire airways  with a single action into the unit. When an airway and  In this case, it is only necessary to enter waypoints along  the airway that represent course changes. In  Figure 3-10, REANS intersection is a changeover point that joins the  Figure 3-10. Entering waypoints along an airway. NOT FOR USE IN NAVIGATION TWENTYNINE PALMS POMONA RAVON CAJON REANS YUCCA 073° 254° 3-8