DO NOT USE FOR NAVIGATION Range View Aux OFF Bearing OFF Nav GPS1 Range View ELTRO DTK 089° 22.1 NM 00:13:18 160 150 140 130 14 4 3 2 20 10 10 20 C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH VLOC 116. 00 114. 10 COM 125.100 122. 800 NAV ELTRO DTK DIS BRG TRK GS ETE 22.1 089 069 nm m m  99.5 067 kt m 6.0 1.0 CRS089 13:18  FA MOTER ELTRO RW 10 ECA VOR 049° Course ATC gives you a vector to the final approach course. to the final approach 089° Course ATC gives you a vector t vector t 08 060° Heading 3 Select the approach course on the CDI. 2 Set the FMS to the nonsequencing mode. C 125 100 6 0 1 0 1 Set the final approach fix as the active waypoint. Figure 3-51. A vectored RNAV approach. 3-36 Terminal Mode Approach Not Active Vectored Approaches Approach Mode fix or closest fix outside the final fix, depending on the unit’s  programming. In the case of a vectors-to-final approach,  activating the vector-to-final causes the FMS to draw a course  line along the final approach course. Once you have loaded and activated the GPS or RNAV  (GPS) approach procedure, flying it is similar to flying  between any other waypoints in a programmed flight route.  However, you must be prepared for two important changes  during the approach. RNAV unit automatically switches to approach sensitivity.  At this stage, the FMS/GPS RNAV further increases RAIM  requirements, and increases the CDI sensitivity from 1 NM  to 0.3 NM (i.e., a full-scale CDI deflection occurs if you are  0.3 NM or more from the desired course). As long as the annunciation for approach mode is displayed,  you may continue the approach. If, however, the computer  fails to switch to approach mode, or the approach mode  annunciation disappears, you must fly the published missed  approach procedure. You are not authorized to descend  further or to the MDA. Making changes to the FMS/ GPS RNAV after reaching the 2 NM point could result in  automatic cancellation of the approach mode. If you arrive at the final approach waypoint and the approach  mode is not active, you must fly the missed approach  procedure. There should be no attempt to activate or  reactivate the approach after reaching the final approach fix  using any means—simply fly the missed approach procedure. The first important change occurs when the aircraft reaches  a point within 30 NM of the destination airport. At this  point, regulations require that every GPS-based FMS/ RNAV unit increase its sensitivity and integrity monitoring  (receiver autonomous integrity monitoring, or RAIM, which  continuously checks GPS signal reliability and alerts you if  RAIM requirements are not met). If the system determines  that RAIM requirements are met, the FMS/GPS RNAV unit  automatically switches from en route sensitivity to terminal  sensitivity within 30 NM of the destination airport. Terminal  mode increases the sensitivity of the course deviation  indicator (CDI) from 5 NM to 1 NM. The FMS/GPS RNAV  displays an annunciation to let you know that it has switched  from en route sensitivity to terminal mode. As in conventional approaches, it is common for air traffic  control to issue vectors to a GPS or RNAV (GPS) final  approach course. Flying a vectored GPS or RNAV (GPS)  approach is a simple matter of using the course intercept  technique described in the previous section. The technique  is illustrated again in  Figure 3-51. The second important change occurs 2 NM prior to reaching  the final approach waypoint. At this point, the FMS/GPS 