TM 1-1510-218-10 3C-99 Table 3C-34.  Navigation Configuration Page (Continued) NO. DESCRIPTION/FUNCTION 5 Scroll vertically to access more configuration pages. 6 Entered Speed deviation alert threshold (knots). 7 Entered groundspeed default for calculations while on the ground. 8 Entered  waypoint  alert  time  in  seconds prior to waypoint arrival or leg switch. 9 Entered     cross     track     deviation     alert threshold (nautical miles). 10 Flight instruments scaling mode selection: OCEANIC, EN ROUTE, TERMINAL, or APPROACH. (c)   Entry and Use of Waypoint Wind.  On the  Flight  Plan  Waypoint  page,  a  predicted  wind  can be  entered  for  each  waypoint  in  the  flight  plan.    Refer to  Figure  3C-44  and  Table 3C-35.    Wind  entries  are used  with  current  True  Airspeed  to  provide  improved prediction for waypoint ETA and ETE as shown on the Lateral Steer page, Figure 3C-42. When  wind  is  entered  at  a  future  waypoint,  the wind   entry   will   be   fixed   at   the   entry   waypoint   and propagate   through   the   flight   plan   to   all   subsequent waypoints.  When new waypoints are inserted into the flight  plan,  the  default  wind  for  the  new  waypoint  will be   based   on   the   previous   waypoint’s   wind   entry.   When no wind entry is provided, the FMS uses current wind for predicted arrivals at the waypoint.  The active waypoint  wind  will  show  the  current  wind  conditions and   entry   is   not   permitted.      The   wind   for   history waypoints  is  the  actual  wind  measured  at  waypoint passage, and entry is not permitted.  Wind direction is entered in the direction from which the wind is blowing. When transferring a flight plan from the alternate to  the  active  flight  plan,  the  waypoint  wind  entered  in the  alternate  flight  plan  will  be  retained  in  the  active flight plan definition. (d)   Control and Display of Bank Command  Limits  and  Crosstrack  Deviation  Alerting.   The  bank  command  limit  for  the  FMS  steering  and flight   plan   leg   switching   is   controlled   by   the   crew entering a value on the Navigation Configuration page. Figure 3C-44.  Flight Plan Waypoint Page Table 3C-35.  Flight Plan Waypoint Page Procedure NO. DESCRIPTION/FUNCTION 1 Access Flight Plan Waypoint page. 2 Enter RTA into the scratchpad. 3 Select RTA line select key to insert RTA. 4 Entered  wind  for  future  legs  (defaults  to computed wind for current leg). 5 Return to the Flight Plan page. 6 T indicates RTA assigned to the waypoint.   Entering a  – and pressing this line select key will delete the RTA at this waypoint. The  bank  command  limit  is  used  by  the  FMS guidance  function  to  limit  FMS  commanded  banks  to the  entered  threshold.    Turn  anticipation  for  waypoint sequencing along the flight plan is adjusted according to the limit specified to minimize overshoot conditions.