SUNOL  TRACY DO NOT USE FOR NAVIGATION C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH VLOC 114. 10 116. 00 COM 121.300 135. 400 NAV SUNOL DTK DIS BRG TRK GS ETE 6.9 080 028 nm m m  85 040 kt m 04:52 5.0 5.0 CRS 080 The assigned heading is mistakenly entered in place of the course to be intercepted. The FMS provides guidance along the wrong course. 049° SUNOL  TRACY DO NOT USE FOR NAVIGATION C RING MSG FPL PROC NRST OBS GPS COM  C V PWR VOL/ SQ PUSH VOL/ ID PUSH VLOC 114. 10 116.00 COM 121.300 135. 400 NAV SUNOL DTK DIS BRG TRK GS ETE 6.9 080 028 nm m m  85 040 kt m 04:52 5.0 5.0 CRS 049 The course to be intercepted is entered correctly,  but the waypoint is not. The FMS provides guidance along the wrong course. 049° Figure 3-42. Setting the wrong active waypoint. Figure 3-41. Selecting the wrong course to the active waypoint. Essential Skills Preprogrammed Holding Patterns Holding 1. Program and select a different course to the active  waypoint. 2. Select the nonsequencing waypoint function (OBS,  Hold, or Suspend) to select a specified navigation  point. 3. Reactivate the sequencing function for route  navigation. The FMS/GPS unit’s nonsequencing mode provides an easy  way to accomplish holding procedures. When instructed to  hold at a waypoint that appears in the route programmed in  the FMS/GPS unit, simply engage the nonsequencing mode  prior to reaching the waypoint. With waypoint sequencing  suspended, you can determine and fly the appropriate holding  pattern entry, select the inbound holding course using the  course selector (OBS in some) knob or buttons, and fly the  holding pattern while timing the outbound leg. Some FMSs  can automatically enter the holding pattern, and continue to  hold if programmed. As the aircraft repeatedly crosses the  holding waypoint with each turn in the hold, the holding  waypoint remains the active waypoint. When you are cleared  out of the holding pattern for the approach or to another  point, you should select the sequencing mode or cancel the  suspension before reaching the holding waypoint for the last  time. When you pass the holding waypoint in sequencing  mode, the FMS/GPS unit will then sequence to the next  waypoint in the route. This procedure is demonstrated in  Figure 3-43. Some FMS/GPS units insert preprogrammed holding patterns  into published instrument procedures. The purpose of a  preprogrammed holding pattern is to relieve you of many of  the tasks described above for flying a holding pattern. Figure 3-44  illustrates a preprogrammed holding pattern that  appears at the end of a missed approach procedure.  As the FMS/GPS unit shown in  Figure 3-44  sequences to  a preprogrammed holding pattern, the navigation displays a  message indicating the type of holding entry required based  on the aircraft’s current track. The system then automatically  switches to a special nonsequencing mode that not only stops  waypoint sequencing, but also sets the inbound course to  the holding waypoint. This special nonsequencing mode  is different from the nonsequencing mode you engage  manually. In  Figure 3-44,  this system uses the term suspend  mode (SUSP) to signify the nonsequencing mode that is  automatically engaged during a preprogrammed holding  procedure. Depending on the type of holding procedure,  the unit may or may not automatically switch back to the  sequencing mode after the aircraft crosses the holding fix.  As always, you must be careful to maintain constant mode  awareness. 3-28