TM 1-1510-218-10 3-27 the    sectorization    is    to    show    the    frequency    first, followed  by  the  identifier  of  the  associated  reference point,   followed   next   by   the   applicable  radials,  and, finally, the associated altitude restrictions. NOTE When  an  altitude  restriction  is  shown  on the    APT    4    page,    the    abbreviation    BEL means at and below the specified altitude.   The abbreviation ABV means at and above the specified altitude. KORL APR  121.10 REF: KMCO 311^o - 60^o BEL 5500FT APT+4 Figure 3-24.  APT 4 Page (BEL) In a few cases, APR, DEP, CL B, CL C, TRSA, CTA,  and  TMA  frequencies  are  sectorized  such  that the  restriction  cannot  be  displayed  on  a  single  page.   When  this  occurs,  TEXT  OF  FREQUENCY  USAGE NOT  DISPLAYED  is  displayed  on  the  APT  4  page.   There are some airports in the database for which no communications information is available.  In this case, COMM FREQ DATA NOT AVAIL is displayed. (5)   Airport 5 Page.  The APT 5 page is used to   store   and   display   user-entered  remarks.    These remarks might  include  information  on  lodging,  dining, airport services, etc.  Up to 100 airports may contain these remarks.  A remark may contain up to 3 lines of 11 characters each.  Letters, numbers, hyphens, and spaces may be used in the remark. 1.   Select the APT 5 page for the desired airport. 2.   Press the right CRSR button. 3.   Rotate  the  right  outer  knob  until  the cursor  fills  the  entire  third  line  of  the screen. 4.   Use the right inner knob to select the first character of the remark. 5.   Turn   the   right   outer   knob   one   step clockwise to move the flashing portion of   the   cursor   to   the   second   cursor position, then use the right inner knob to select the second character. 6.   Use the right outer and inner knobs to select  the  rest  of  the  first  line  of  the remark. 7.   Press the  ENT  button  to  approve the first line.  The cursor will move to the second line. 8.   Use the above procedure to select the characters   of   the   second   and   third lines  of  the  remark.    Press  the    ENT button   to   individually   approve   each line of the remark. 9.   Press  the  right   CRSR  button  to   turn the right cursor function off. (6)   Airport 6 Page.    The  APT  6  page  shows aeronautical services available for the selected airport.   These   services   include   customs,   fuel,   and   oxygen availability as well as an indicator of a landing fee. (a)  Customs Information.   Refer to Table 3-9 for customs displays and their explanations. Table 3-9.  Customs Information   DISPLAY EXPLANATION Blank Blank line indicates that customs information is not available in the database. CUSTMS– ADCS Customs are available for private   aircraft   arriving   to   the U.S.   from   Canada   or   Mexico.   Advance    notice    of    arrival    to customs officers is to be included in the flight plan transmitted   to   a   FAA   facility.   This  code  is  used  when  this  is the   only   type   customs   facility available. CUSTMS– PR Customs facilities are available, but    require    prior    request    or permission for use. CUSTMS– REST Customs  facilities  are  available on   a   restricted   basis.      Check with  airport  before  planning  to use.