TM 1-1510-225-10 3D-68 angles  to  use  on  the  NAV  4  page.    Refer  to  Figure 3D-99. CAL 4 VNV ANGLE GS:   240KT FPM:   1500 ANGLE: 3.5^o Figure 3D-99.  CAL 4 Page 1.   Select the CAL 4 page on the left side. 2.   Press the left  CRSR button to turn on the cursor function. 3.   Use the left inner and outer knobs to enter what   the   aircraft’s   groundspeed   will   be during the descent or ascent. 4.   Turn the left outer knob to move the cursor to  the  first  FPM  position,  and  then  enter the  desired  rate  of  descent  or  ascent  (in feet  per  minute)  using  the  left  inner  and outer knobs.  The descent/ascent angle is now  displayed.    In  addition,  an angle may be entered and the angle will be determined. 5.   Press the left  CRSR button to turn off the cursor function. e.   The Calculator 5 Page.    The  CAL  5  page  is used to perform two types of conversions: between ºC and ºF and between knots and miles per hour.  Refer to Figure 3D-100. CAL 5 TEMP/SPEED    030^oC    086^oF    260KT    299MPH Figure 3D-100.  CAL 5 Page 1.   Display the CAL 5 page on the left side. 2.   Press the left  CRSR button to turn on the left cursor function. 3.   To   convert   ºC   to   ºF,   use   the   left   outer knob    to    position    the    cursor    over    the appropriate  Celsius  digits  and  use  the left inner  knob  to  select  the  desired  values.   When   the   desired   temperature   in   ºC   is selected,  the  corresponding  temperature in ºF is displayed. 4.   To   convert   ºF   to   ºC,   use   the   left   outer knob    to    position    the    cursor    over    the appropriate  Fahrenheit  digits  and use the left    inner    knob    to    select    the    desired values.  When the desired temperature in ºF is selected, the corresponding temperature in ºC is displayed. 5.   To  convert  knots  to  miles  per  hour,  use the  left  outer  knob  to  position  the  cursor over  the  appropriate  knots  digits  and  use the  left  inner  knob  to  select  the  desired values of speed.  When the desired speed in   knots   is   selected,   the   corresponding speed in miles per hour is displayed. 6.   To  convert  miles  per  hour  to  knots,  use the  left  outer  knob  to  position  the  cursor over  the  appropriate  miles  per  hour  digits and  use  the  left  inner  knob  to  select  the desired    values    of    speed.        When    the desired     speed     in     miles     per     hour     is selected,    the    corresponding    speed    in knots is displayed. 7.   Press the left  CRSR button to  turn off the left cursor function. f.    The Calculator 6 Page.    The  CAL  6  page  is used   to   convert   any   time   in   one   time   zone   to   the corresponding  time  in  another  time  zone.    Refer  to Figure 3D-101. CAL 6 TIME CONV 13:24 CDT CENTRAL DAY 18:24 UTC CORD UNIV/Z Figure 3D-101.  CAL 6 Page