TM 1-1510-218-10 3C-84 Under  normal  operation,  the  FMS  will  automatically configure   the   FMS   for   the   current   mode   of   flight, selecting either TERMINAL, EN ROUTE, or APPROACH.      If   a   different   flight   mode   is   desired, including OCEANIC, select the  FLT MODE line select to activate the desired mode.  The flight mode not only affects the scaling of deviation pointers, but also sets the  limits  of  the  GPS  RAIM    function  and  navigation accuracy limits.  The system bank limit can be entered on  the  Navigation  Configuration  1  page.    The  bank limit  applies  to  FMS  guidance  during  execution  of  the flight plan. Figure 3C-30.  Navigation Configuration Page Access and Functions Table 3C-22.  Navigation Configuration Page Access and Functions Procedure NO. DESCRIPTION/FUNCTION 1 Select index 1 page. 2 Access Nav Config 1 page. 3 Indication of pilot selection. 4 Flight Plan Guidance-Bank Limit. 5 Flight  instrument  scaling  mode  selection: OCEANIC,    EN    ROUTE,    TERMINAL,    or APPROACH. 6 Scroll vertically to access more configuration pages. 7 Entered   Speed   deviation   alert   threshold (knots). 8 Entered groundspeed default for calculations while on the ground. 9 Entered   waypoint   alert   time   in   seconds prior to waypoint arrival or leg switch. 10 Entered cross track deviation alert threshold (nautical miles). (e)   External Alert Configuration.  On the Navigation  Configuration  2  page, alert thresholds can be entered to configure the FMS alerts to desired limits that   the   pilot   wishes   to   maintain.      When   the   FMS reaches the alert threshold, an appropriate annunciation or external alert is provided to advise the pilot.  When crosstrack deviation is exceeded, an  XTK ALERT  annunciation  is    provided  until  the  aircraft  is maneuvered back into desired limits.  When the speed of    the    aircraft    exceeds    the    speed    alert    limits,    a SPEED  annunciation  is  provided  until  the  aircraft’s speed is throttled back within limits. When a waypoint alert time is  entered, the FMS will  provide  an  external  waypoint  alert  advisory  and then the FMS will sequence to the next waypoint with the alert threshold.  This waypoint alert threshold only affects  external  advisories  on  capsule  lights  or  flight instruments to give  the  pilot  a  heads-up of impending transitions   while   in   OCEANIC   or   EN   ROUTE   flight modes.   When  in  TERMINAL  or  APPROACH  modes, the    FMS    and    external    advisories    will    always    be generated 10 seconds prior to waypoint sequencing. (f)    Ground  Calculation.    When  on  the ground, the FMS provides the pilot the ability to review flight    profiles    and    system    calculations.        On    the Navigation  Configuration  2  page  while  on  the  ground, a   groundspeed   entry   is   provided   for   the   pilot   to forecast anticipated performance in flight and   provide expected  flight  times  en  route  to  each  destination  in the flight plan.