
                                  ILS
                       DATA BASE RECORD LAYOUT  
                             (ILS-FILE)  

INFORMATION EFFECTIVE DATE: 5/21/1999 

    RECORD FORMAT: FIXED  
    LOGICAL RECORD LENGTH: 780 
  
  
FILE STRUCTURE DESCRIPTION:  
---------------------------  
  
    THERE ARE A VARIABLE NUMBER OF FIXED-LENGTH RECORDS FOR  
    EACH INSTRUMENT LANDING SYSTEM (ILS).  THE NUMBER OF RECORDS  
    IS DETERMINED BY THE NUMBER OF REMARK FIELDS RELATED TO EACH  
    ILS.  THE RECORDS ARE IDENTIFIABLE BY A RECORD TYPE  
    INDICATOR (ILS1 OR ILS2), AIRPORT SITE NUMBER, RUNWAY END,  
    AND ILS SYSTEM TYPE.  
  
    EACH RECORD ENDS WITH A CARRIAGE RETURN CHARACTER AND LINE FEED 
    CHARACTER (CR/LF). THIS LINE TERMINATOR IS NOT INCLUDED IN THE 
    LOGICAL RECORD LENGTH.

    THE FILE IS SORTED BY STATE, CITY, AIRPORT NAME, RUNWAY  
    END, SYSTEM TYPE, AND RECORD TYPE.  
  
  
DESCRIPTION OF THE RECORD TYPES:  
--------------------------------  
  
    AN 'ILS1' RECORD TYPE CONTAINS THE ILS DATA FOR  
    THE RESPECTIVE RUNWAY END'S SYSTEM. THERE IS ALWAYS AN ILS1 RECORD.  
  
    AN 'ILS2' RECORD TYPE CONTAINS ONE 400 CHARACTER  
    REMARK PERTAINING TO THE PRECEDING ILS1 RECORD.  
  
    EACH ILS1 RECORD MAY HAVE NONE, ONE, OR MANY ASSOCIATED  
    ILS2 RECORDS.  
    EACH ILS2 RECORD CONTAINS THE BASIC ILS IDENTIFYING  
    INFORMATION (AIRPORT SITE NUMBER, RUNWAY END,  
    AND ILS SYSTEM TYPE).  
  
  
GENERAL INFORMATION:  
--------------------  
     1.  LEFT JUSTIFIED FIELDS HAVE TRAILING BLANKS  
     2.  RIGHT JUSTIFIED FIELDS HAVE LEADING BLANKS  
     3.  ELEMENT NUMBER IS FOR INTERNAL REFERENCE ONLY  
         AND NOT IN THE RECORD.  
     4.  THE UNIQUE ILS IDENTIFIER IS MADE UP OF  
   
 
 
         THE AIRPORT SITE NUMBER, RUNWAY END, AND  
         ILS SYSTEM TYPE.  
     5.  LATITUDE AND LONGITUDE INFORMATION IS REPRESENTED IN  
         TWO WAYS:  
         A.  FORMATTED:  
            ------------  
            LATITUDE    DD-MM-SS.SSSH  
            LONGITUDE   DDD-MM-SS.SSSH  
  
            WHERE :     DD IS DEGREES  
                        MM IS MINUTES  
                        SS.SSS IS SECONDS  
                        H IS DECLINATION  
  
            EXAMPLE :   LAT-   39-06-51.070N  
                        LONG-  075-27-54.660W  
  
          B.  IN ALL SECONDS:  
             -----------------  
             LATITUDE AND LONGITUDE     SSSSSS.SSSH  
             WHERE :    SSSSSS.SSS IS THE DEG/MIN/SEC CONVERTED  
                                   TO ALL SECONDS  
                        H IS THE DECLINATION  
  
             EXAMPLE :  LAT-   140811.070N  
                        LONG-  271674.660W  
  
*********************************************************************  
  
            'ILS1' RECORD TYPE - BASE DATA  
  
********************************************************************  
  
J  T   L   S L   E N  
U  Y   E   T O   L U  
S  P   N   A C   E M  
T  E   G   R A   M B  
       T   T T   E E  
       H     I   N R  
             O   T  
             N           FIELD DESCRIPTION  
  
  
L AN   04 00001  N/A     RECORD TYPE INDICATOR.  
                           ILS1:  ILS DATA FOR RESPECTIVE RUNWAY.  
  
                            ILS AIRPORT/RUNWAY INFORMATION  
                         -------------------------------------  
  
L AN 0011 00005  DLID    AIRPORT SITE NUMBER IDENTIFIER. (EX. 04508.*A)  
L AN 0003 00016  DLID    ILS RUNWAY END IDENTIFIER. (EX: 18,36L)  
                         NOTE:  RUNWAY END IDENTIFIERS 00 AND 22V  
                                ARE VALID AND ARE USED TO ACCOMODATE  
                                LIMITATIONS IN THE GIM-II DBMS.  
L AN 0010 00019  I22     ILS SYSTEM TYPE  
   
 
 
  
                           SYSTEM TYPE          DESCRIPTION  
                         ---------------      ---------------  
                         ILS            INSTRUMENT LANDING SYSTEM  
                         MLS            MICROWAVE LANDING SYSTEM  
                         SDF            SIMPLIFIED DIRECTIONAL FACILITY  
                         LOCALIZER      LOCALIZER  
                         LDA            LOCALIZER-TYPE DIRECTIONAL AID  
                         ISMLS          INTERIM STANDARD MICROWAVE  
                                        LANDING SYSTEM  
                         ILS/DME        INSTRUMENT LANDING SYSTEM/  
                                        DISTANCE MEASURING EQUIPMENT  
                         SDF/DME        SIMPLIFIED DIRECTIONAL FACILITY/  
                                        DISTANCE MEASURING EQUIPMENT  
                         LOC/DME        LOCALIZER/DISTANCE MEASURING  
                                        EQUIPMENT  
                         LOC/GS         LOCALIZER/GLIDE SLOPE  
                         LDA/DME        LOCALIZER-TYPE DIRECTIONAL AID/  
                                        DISTANCE MEASURING EQUIPMENT  
L AN 0010 00029  N/A     INFORMATION EFFECTIVE DATE (MM/DD/YYYY)  
                         THIS DATE COINCIDES WITH THE 56 DAY CHARTING  
                         AND PUBLICATION CYCLE EFFECTIVE DATE.  
L AN 0042 00039  A2      AIRPORT NAME.(EX: CHICAGO O'HARE INTL)  
L AN 0026 00081  A1      ASSOCIATED CITY.(EX:  CHICAGO)  
L AN 0002 00107  A4      TWO LETTER POST OFFICE CODE FOR THE STATE.  
                         (EX: IL)  
L AN 0020 00109  A4S     STATE NAME.(EX:  ILLINOIS)  
L AN 0003 00129  A6      FAA REGION CODE.(EXAMPLE, ACE = CENTRAL)  
L AN 0004 00132  E7      AIRPORT IDENTIFIER.  
                         (EX: ORD FOR CHICAGO O'HARE INTL)  
R  N 0005 00136  A31     ILS RUNWAY LENGTH IN WHOLE FEET. (EX:  4000)  
R  N 0004 00141  A32     ILS RUNWAY WIDTH IN WHOLE FEET. (EX:  100)  
  
                             ILS SYSTEM INFORMATION  
                         ------------------------------  
  
L AN 0009 00145  I20     CATEGORY OF THE ILS. (I,II,IIIA)  
L AN 0050 00154  I10     NAME OF OWNER OF THE FACILITY. (EX: U.S. NAVY)  
L AN 0050 00204  I12     NAME OF THE ILS FACILITY OPERATOR.  
                         (EX: U.S. ARMY)  
L AN 0003 00254  I23     ILS APPROACH BEARING IN DEGREES MAGNETIC.  
                         (EX: 233)  
L AN 0003 00257  I24     THE MAGNETIC VARIATION AT THE ILS FACILITY.  
                         (EX: 09E)  
  
                             LOCALIZER INFORMATION  
                         -----------------------------  
  
L AN 0015 00260  I7      TYPE OF LOCALIZER FACILITY ON SITE.  
  
                         TYPE      DESCRIPTION  
                         ----      -----------  
                         LOC        LOCALIZER.  
                         LDA        LOCALIZER-TYPE DIRECTIONAL AID.  
   
 
 
                         LOC/DME    LOCALIZER AND DISTANCE MEASURING  
                                    EQUIPMENT.  
                         SDF/DME    SIMPLIFIED DIRECTIONAL FACILITY  
                                    AND DISTANCE MEASURING EQUIPMENT.  
                         SDF        SIMPLIFIED DIRECTIONAL FACILITY.  
                         LDA/DME    LOCALIZER-TYPE DIRECTIONAL AID  
                                    AND DISTANCE MEASURING EQUIPMENT.  
  
L AN 0005 00275  I30     IDENTIFICATION CODE OF LOCALIZER.  
                         (EX:  M-IS, I-DD)(IDENTIFIER IS PREFIXED BY  
                         M- FOR ISMLS, MLS; I- FOR LDA/DME, LDA,  
                         LOCALIZER, ILS/DME, LOC/DME, LOC/GS, ILS;  
                         BLANK FOR ANY OTHER CODE.  
L AN 0006 00280  I31     LOCALIZER FREQUENCY (MHZ). (EX: 108.10)  
L AN 0014 00286  I4      LATITUDE OF LOCALIZER ANTENNA.(FORMATTED)  
L AN 0011 00300  I4S     LATITUDE OF LOCALIZER ANTENNA.(ALL SECONDS)  
L AN 0014 00311  I5      LONGITUDE OF LOCALIZER ANTENNA.(FORMATTED)  
L AN 0011 00325  I5S     LONGITUDE OF LOCALIZER ANTENNA.(ALL SECONDS)  
R AN 0005 00336  I28     LOCALIZER COURSE WIDTH.(DEGREES AND HUNDREDTHS)  
                         (EX: 3.00)  
R  N 0005 00341  I34     LOCALIZER DISTANCE FROM STOP END OF RWY. (FEET)  
                         (IF NEGATIVE INDICATES PLACEMENT INBOARD FROM  
                         STOP END OF RUNWAY)(EX: -170)  
R  N 0006 00346  I36     DISTANCE OF LOCALIZER ANTENNA  
                         FROM APPROACH END OF RUNWAY.(FEET)  
                         (IF NEGATIVE INDICATES PLACEMENT INBOARD FROM  
                         APPROCH END OF RUNWAY)  
                         (EX:  6000, -567)  
  
                             GLIDE SLOPE INFORMATION  
                         -------------------------------  
  
L AN 0015 00352  I43     GLIDE SLOPE CLASS/TYPE.  
  
                         TYPE          DESCRIPTION  
                         ----          -----------  
                         GLIDE SLOPE   STANDARD GLIDE SLOPE.  
                         GS/DME        GLIDE SLOPE WITH DISTANCE  
                                       MEASURING EQUIPMENT.  
                         BLANK         NO GLIDE SLOPE FACILITY.  
  
L AN 0004 00367  I26     GLIDE SLOPE ANGLE IN DEGREES  
                         AND HUNDREDTHS OF DEGREE.(EX:  2.75)  
L AN 0006 00371  I42     GLIDE SLOPE TRANSMISSION FREQUENCY.  
                         (EX:  330.50)  
L AN 0014 00377  I44     LATITUDE OF GLIDE SLOPE TRANSMITTER ANTENNA.  
                         (FORMATTED)  
L AN 0011 00391  I44S    LATITUDE OF GLIDE SLOPE TRANSMITTER ANTENNA.  
                         (ALL SECONDS)  
L AN 0014 00402  I45     LONGITUDE OF GLIDE SLOPE TRANSMITTER ANTENNA.  
                         (FORMATTED)  
L AN 0011 00416  I45S    LONGITUDE OF GLIDE SLOPE TRANSMITTER ANTENNA.  
                         (ALL SECONDS)  
R  N 0006 00427  I48     DISTANCE OF GLIDE SLOPE ANTENNA FROM APPROACH  
                         END OF RUNWAY.(FEET) (EX:  1050)  
   
 
 
R  N 0007 00433  I108    ELEVATION OF RUNWAY AT POINT ADJACENT TO THE  
                         GLIDE SLOPE ANTENNA.(NEAREST TENTH OF A FOOT  
                         MSL) (EX:  210.5)  
  
                             INNER MARKER INFORMATION  
                         --------------------------------  
  
L AN 0015 00440  I55     FACILITY/TYPE OF INNER MARKER.  
  
                         TYPE        DESCRIPTION  
                         ----        -----------  
                         MARKER      MARKER BEACON ONLY  
                         BLANK       NO INNER MARKER BEACON.  
  
L AN 0014 00455  I56     LATITUDE OF INNER MARKER/BEACON.(FORMATTED)  
L AN 0011 00469  I56S    LATITUDE OF INNER MARKER/BEACON.(ALL SECONDS)  
L AN 0014 00480  I57     LONGITUDE OF INNER MARKER/BEACON.(FORMATTED)  
L AN 0011 00494  I57S    LONGITUDE OF INNER MARKER/BEACON.(ALL SECONDS)  
R  N 0006 00505  I60     DISTANCE FROM INNER MARKER TO APPROACH  
                         END OF RUNWAY.(FEET) (EX:  850)  
  
                             MIDDLE MARKER INFORMATION  
                         ---------------------------------  
  
L AN 0015 00511  I70     FACILITY/TYPE OF MIDDLE MARKER/LOCATOR.  
  
                         TYPE          DESCRIPTION  
                         ----          -----------  
                         MARKER        MIDDLE MARKER BEACON ONLY  
                         COMLO         COMPASS LOCATOR  
                         NDB           NONDIRECTIONAL RADIO BEACON  
                         MARKER/COMLO  MIDDLE MARKER/ COMPASS LOCATOR  
                         MARKER/NDB    MIDDLE MARKER/ NONDIRECTIONAL  
                                       RADIO BEACON.  
                         BLANK         NO MIDDLE MARKER BEACON  
  
L AN 0002 00526  I67     LOCATION IDENTIFIER OF BEACON AT MIDDLE MARKER.  
                         (EX:  LP)  
L AN 0005 00528  I81     NAME OF THE MIDDLE MARKER LOCATOR BEACON.  
                         (EX:HOGAF, VIOLE)  
R  N 0003 00533  I68     FREQUENCY OF LOCATOR BEACON AT MIDDLE MARKER  
                         IN KHZ.(EX: 190)  
L AN 0014 00536  I71     LATITUDE OF LOCATOR AND MIDDLE MARKER BEACON.  
                         (IF BOTH LOCATOR AND MIDDLE MARKER  
                         ARE PRESENT,  LATITUDE OF LOCATOR, IF DIFFERENT  
                         IS REFLECTED IN THE REMARKS SECTION IN  
                         FORMATTED MODE ONLY.) (FORMATTED)  
L AN 0011 00550  I71S    LATITUDE OF LOCATOR AND MIDDLE MARKER (BEACON).  
                         (ALL SECONDS)  
L AN 0014 00561  I72     LONGITUDE OF COMPASS LOCATOR AND MIDDLE MARKER  
                         BEACON.  
                         (IF BOTH LOCATOR AND MIDDLE MARKER  
                         ARE PRESENT,  LONGITUDE OF LOCATOR, IF  
                         DIFFERENT,IS REFLECTED IN THE REMARKS SECTION  
                         IN FORMATTED MODE ONLY.)(FORMATTED)  
   
 
 
L AN 0011 00575  I72S    LONGITUDE OF COMPASS LOCATOR AND MIDDLE MARKER  
                         BEACON.(ALL SECONDS)  
R  N 0006 00586  I75     DISTANCE OF MIDDLE MARKER LOCATOR  
                         FROM APPROACH END OF RUNWAY.(FEET)  
                         (EX:  3200)  
  
                             OUTER MARKER INFORMATION  
                         --------------------------------  
  
L AN 0015 00592  I85     FACILITY TYPE OF OUTER MARKER LOCATOR.  
  
                         TYPE          DESCRIPTION  
                         ----          -----------  
                         MARKER        OUTER MARKER BEACON ONLY  
                         COMLO         COMPASS LOCATOR  
                         NDB           NONDIRECTIONAL RADIO BEACON  
                         MARKER/COMLO  OUTER MARKER/ COMPASS LOCATOR  
                         MARKER/NDB    OUTER MARKER/ NONDIRECTIONAL  
                                       RADIO BEACON.  
                         BLANK         NO OUTER MARKER/LOCATOR  
  
L AN 0002 00607  I82     LOCATION IDENTIFIER OF OUTER MARKER LOCATOR.  
                         (EX: PI, HK)  
L AN 0005 00609  I96     NAME OF OUTER MARKER LOCATOR.  
                         (EX: BOOIE, PRICE)  
R  N 0003 00614  I83     FREQUENCY OF TRANSMISSION OF OUTER MARKER  
                         LOCATOR IN KHZ. (EX: 190)  
L AN 0014 00617  I86     LATITUDE OF OUTER MARKER LOCATOR (FORMATTED).  
                         (IF BOTH LOCATOR AND OUTER MARKER ARE  
                         PRESENT,  LATITUDE OF LOCATOR, IF DIFFERENT  
                         IS REFLECTED IN THE REMARKS SECTION,  
                         IN FORMATTED MODE ONLY.)(FORMATTED)  
L AN 0011 00631  I86S    LATITUDE OF OUTER MARKER LOCATOR (SECONDS).  
L AN 0014 00642  I87     LONGITUDE OF LOCATOR/ OUTER MARKER.(FORMATTED)  
                         (IF BOTH LOCATOR AND OUTER MARKER  
                         ARE PRESENT, LONGITUDE OF LOCATOR, IF DIFFERENT  
                         IS REFLECTED IN THE REMARKS SECTION IN  
                         FORMATTED MODE ONLY)  
L AN 0011 00656  I87S    LONGITUDE OF LOCATOR/ OUTER MARKER.(ALL SEC.)  
R  N 0006 00667  I90     DISTANCE FROM APPROACH END OF RUNWAY TO  
                         OUTER MARKER/LOCATOR (FEET).  
                         (EX:  26650)  
L AN 0009 00673  I27     AVAILABILITY OF BACK COURSE MARKER.  
                         (EX:  NONE, SEE RMRKS)  
  
                         DISTANCE MEASURING EQUIPMENT (DME) INFORMATION  
                         ----------------------------------------------  
  
L AN 0004 00682  I98     CHANNEL ON WHICH DISTANCE DATA IS TRANSMITTED.  
                         (EX:  032X, 038X)  
L AN 0014 00686  I99     LATITUDE OF DME  
                         TRANSPONDER ANTENNA.(FORMATTED)  
L AN 0011 00700  I99S    LATITUDE OF DME  
                         TRANSPONDER ANTENNA.(ALL SECONDS)  
L AN 0014 00711  I100    LONGITUDE OF DME  
   

 
 
                         TRANSPONDER ANTENNA.(FORMATTED)  
L AN 0011 00725  I100S   LONGITUDE OF DME  
                         TRANSPONDER ANTENNA.(ALL SECONDS)  
R  N 0006 00736  I103    DISTANCE OF DME  
                         FROM APPROACH END OF RUNWAY (FEET).  
                         (EX:  8650, -585)  
R  N 0005 00742  I104    DISTANCE OF DME  
                         ANTENNA FROM STOP END OF RUNWAY.  
                         (EX:  462, -585)  
L AN 0034 00747  N/A     BLANK   
    
   
********************************************************************  
  
     'ILS2' RECORD TYPE - INSTRUMENT LANDING SYSTEM REMARKS  
  
*******************************************************************  
  
J  T   L   S L   E N  
U  Y   E   T O   L U  
S  P   N   A C   E M  
T  E   G   R A   M B  
       T   T T   E E  
       H     I   N R  
             O   T  
             N           FIELD DESCRIPTION  
  
L AN   04 00001  N/A     RECORD TYPE INDICATOR.  
                           ILS2:  ILS REMARKS FOR RESPECTIVE RUNWAY END  
L AN 0011 00005  DLID    AIRPORT SITE NUMBER IDENTIFIER  
L AN 0003 00016  DLID    ILS RUNWAY END IDENTIFIER.  
L AN 0010 00019  I22     ILS SYSTEM TYPE (SEE ILS1 RECORD FOR DESCRIPTION)  
L AN 0400 00029  RMRKS   ILS REMARKS, FREE-FORM TEXT.  
L AN 0352 00429  N/A     BLANK   




