TM 1-1510-218-10 3-64 airport  list.     If  HRD  is  chosen,  only hard surface runways will be included.   Hard surface runways include concrete,  asphalt,  pavement,  tarmac, brick,    bitumen,    and    sealed.        Soft surface  runways  include  turf,  gravel, clay,   sand,   dirt,   ice,   steel   matting, shale, and snow. (5)   The  Setup  4  Page.    The  SET  4  page  is used  to  define  the  departure  time.    Refer  to  Figure 3-84. 1.   Select the SET 4 page. 2.   Turn on the left cursor function. 3.   Use    the    left    inner    knob    to    select between  RUN  WHEN  GS  >  30KT  or RUN WHEN POWER IS ON. 4.   Turn off the left cursor function. SET 4   FLIGHT   TIMER OPERATION RUN WHEN GS > 30KT Figure 3-84.  SET 4 Page (6)   The  Setup  5  Page.    The  height  above airport feature provides an alert annunciator when the aircraft   has   reached   a   selected   altitude   above   the airport.  This feature is enabled/disabled on the SET 5 page.      Refer   to   Figure   3-85.      The   altitude   is   also selected on the SET 5 page. SET 5 HT ABOVE APT ALERT     ON APT ELEV   +1500FT Figure 3-85.  SET 5 Page The height above airport alert feature does not   serve   the   same   function   as   a   radar altimeter.  It does not provide any warning about the aircraft's actual height above the airport's surrounding terrain. CAUTION The  height  above  airport  alert  feature  will only be accurate if the barometric altimeter setting   is   correct.      If   the   height   above airport   function   is   enabled,   ensure   the barometric  altimeter  setting  is  correct  on the ALT page. When  the  height  above  airport  is  enabled,  the KLN  90B  creates  a  5-nm  radius  cylinder  of  airspace centered on an airport.  This airport is any airport that is  a  direct  to  waypoint  or  is  the  to  waypoint  in  the active flight plan.  The height of the cylinder above the airport is the height selected on the SET 5 page.  The KLN  90B  adds  the  selected  altitude  to  the  elevation stored  in  the  database  for  the  airport.    The  KLN  90B provides  an  altitude  alert  light  when  the  aircraft  first penetrates the cylinder. To enable or disable the height above the airport alert,  press  the  left  CRSR  button.    Use  the  left  outer knob  to  position  the  cursor  over  the  enable/disable field.  Turn the left inner knob to select on or off.  To select the height, use the left outer knob to position the cursor over the altitude field.  Turn the left inner knob to select an offset between 800 and 2000 feet.  Press the left CRSR button to turn off the cursor function. (7)   The Setup 6 Page.  Turn anticipation may be  enabled  or  disabled  on  the  SET  6  page.  Refer to Figure 3-86.  Turn on the left cursor function and use the   left   inner   knob   to   select   between   ENABLE   or DISABLE.  If turn anticipation is disabled, navigation is provided   all   the   way   to   the   waypoint   and   waypoint WARNING