TM 1-1520-218-10 3C-175 selecting the right line select key corresponding to the scan list item and, like on the Frequency Preset page, assign  a  frequency  and  callsign  to  the  scan  list  item.   On   the   Frequency   Presets   pages,   transfer   presets from   the   V/UHF   Presets   pages   to   the   scan   list   by accessing  the  V/UHF  Preset  xx  page  of  the  desired preset and press the  SCAN INSR line select key.  The V/UHF  Scan  List  page  will  be  displayed  with  INSERT PRESET AT? in the scratchpad.  Press any of the four left line select keys to insert the frequency preset into the scan list. Figure 3C-127.  Scan Preset Page Access and Usage Table 3C-89.  Scan Preset Page Access and Usage Procedure NO. DESCRIPTION/FUNCTION 1 Press  the  line  select  key  to  access the presets page(s) and laterally scroll to the scan list page. 2 Indicates    first    scan    list    item    used when   push-to-talk  is  pressed  during scan. 3 To  activate  scan  function  and  return to communication page. 4 Press  the  line  select  key  to   access scan preset page to define. 5 Select callsign for scan frequency. 6 Select  frequency  and  modulation  for scan. (e)   V/UHF  Airport  Frequency  Selection.   To tune the radio to airport frequencies stored on the data  cartridge,  access  the  V/UHF  Airport  Frequency page.    The  V/UHF  Airport  Frequency  page  may  be accessed from the Communication page by entering a valid airport identifier and then pressing the line select key  1R.    Refer  to  Figure  3C-128   and   Table   3C-90.   With  a  valid  airport  identifier  displayed  at  line  select key  1R,  press  this  key  to  access  the  communication radio frequencies associated with that airport. Line  select  keys  1L  through  4L  on  the  Airport Frequency  page  will  select  the  corresponding  airport frequency   and   tune   the   radio   to   the   frequency   or channel    that    was    selected.        The    currently    tuned frequency will be indicated with an  * instead of an  ® adjacent to the line select key. Vertical   scrolling   will   access   additional   V/UHF Airport Frequency pages.  The scrolling wraps around if more than one page exists. Data  lines  1  through  4  will  display  the  following airport frequency information. 1.   The V/UHF frequency. 2.   The  3  or  4-character communication type (ATI, CPT, etc.). 3.   The sectorization data, if any.