International Civil Aviation Organization Middle East Office Seminar

International Civil Aviation Organization Middle East Office Seminar On Aeronautical Spectrum Management Cairo, 4 - 6 June 2006 Agenda Item 6: Frequency Management in AFI and MID Regions Presented by Mary Obeng RO/CNS, Dakar Office

The role of Regional Offices in Frequency Management The Regional Offices manage and coordinate with States on the utilization of : HF frequency band 130 -535 KHz which is allocated to NDBs COM LIST No. 1 VHF frequency bands 108 -117. 975 MHz and 960 -1215 MHz COM LIST No. 2 VHF frequency band 117. 975 -137 MHz AM[R]S Air- Ground COM LIST No. 3 All the COM LISTs are prepared and published by ICAO Western and Central African Office for AFI Region.

COM LIST No. 1 • The layout consist of the Introductory part, {A}, which provide means for estimating the minimum acceptable difference between the radio frequencies of two NDBs which are geographically separated by a specified distance. • Part 1: - Consisting of Alphabetical list by country of Radionavigation Aids in the LF/MF Band. Page 1 of the Part 1 contains a list of AFI States and their ICAO Country Codes. The rest is the table with 9 columns.

LOCATION 1 Freq. MHz 2 BANANKORO 286. 00 BOKE 382. 00 ID EQUIP. 3 4 GK OK NBD NDB COORDINATES 5 0915 N 0918 W 1058 N 1417 W CAT 6 NAT COVERAGE 7 POWER REMARKS 8 9 50 W Column 1: Column 2: Column 3: Column 4: Column 5: Column 6: The Header –The country, and the place name of the location. The frequency of the equipment in the LF/: F band The code designator of the facility The type of equipment, NDB or L The geographical co-ordinates of the location Category of the facility ICAO –if the Implementation is in accordance AFI Air navigation Plan Operation Characteristics In accordance to Annex 10. NAT –National i. e. other categories. Column 7: This column shows the coverage in NM Column 8: Transmitter power when known Column 9: Remarks Part 2 is the list by order of frequency of the Radio Navigation AIDS.

The table is similar to the previous one, the column 1 is replaced by frequency, Column 2 by Indent, Column 3 Location of the facility. The rest of the columns are the same. ANGOLA FREQ. ID 310. 30 ZUV 310. 30 ZUI LOCATION PELICAN POINT ROBBEN/ ISLAND CODE EQUIP. COORDINATES CAT. ASO NDB 2253 S 1426 E NAT AFS NDB 3349 S 1823 E NAT COVER. POWER REMARKS 100

Status of NDBs There is a gradual withdrawal of NDBs in AFI. New installations of NDBs are discouraged unless there is a special need like PANs OPs COM List No. 2 • List of facilities Operating on Frequencies in the Bands: • 108 -117. 975 MHz • 960 -1215 MHz • The list is presented in three parts with a prelude of the relevant Annex 10 SARPs [Vol. 1, Part 11, para 4. 2. 1 and 4. 2] dealing with the utilization of the frequencies in the band 108 -117. 975 MHz and the Annex 10 guidance material concerning geographical separation for co-channel assignments. • VOR should be in the band 111. 975 -117. 975 MHz

Criteria for geographical separation of VOR and/or VOR/DME in AFI Region AFI Limited RAN [COM/MET/RAC] Meeting 1988 Lome, adopted the following criteria: - a) for VORs required to serve en-route flight operations up to FL 500, geographical separation of: for co-channel 550 NM between 200 NM/FL 450 facilities for adjacent channel 220 NM. b) for VORs required for use in terminal areas 40 NM/ FL 250 m geographical separation of 200 NM for co-channel and 60 NM for adjacent channel. c) for VORs required for use in final approach and landing 25 NM/FL 100 geographical separation of 130 NM and 30 NM for adjacent channel.

ILS • The prelude has a list of pairs of glide and localizer frequencies to select from. • Part I: - National and international assignments in Country order. • Page 1 of Part I consists of AFI countries and their 3 -letter codes. The table consists of 12 columns: -

ANGOLA LOCATION FREQ. CABINDA 114. 300 CATUMBELA 114. 700 • • Column 1: Column 2: Column 3: Column 4: • • • Column 5: Column 6: Column 7: Column 8: Column 9: • • Column 10: Column 11: • Column 12: ID DME EQUIP. COORDINATES VCA VOR 90 VOR/DME NAT O 537 S 1212 E CAT. COVER. HGT_RWY VOR_ILS DME-OP RMKS NAT 100 OP OP The place name of the location. The frequency in the 108 -117. 975 MHz band The identification of the equipment [ILS/ VOR] The number of the DME or TACAN channel paired, according to the ICAO pairing plan with the VHF channel in column 2. The type of equipment e. g. VOR, TVOR, ILS, etc The geographical co-ordinates of the location. The category of the facility The designated Operational range expressed in Nautical Miles [NM] The designated operational height expressed in thousands of for VOR DME and TACAN, for ILS this column shows the runway number. The status of operation or date planned for Implementation of the facility The status of operation or the date planned for implementation of the DME or TACAN Remarks

Part II : List of National and International Assignments in frequency order FREQ. ID DME CODE LOCATION EQUIP. COORDINATES CAT. COVER HGT-RWY VOR-ILS DME REMARKS 108. 300 IEAL 20 108. 500 ALG • • • Column Column Column ARS JEDDAH/ ILS/DME KING ABDOUL AZIZE 2142 N 3910 E NAT 20 34 R OP ALGER/ ILS HOUARI BOUMEDIENE 3642 N 0313 E ICAO 20 09 OP OP OP CAT I 1: The frequency of the facility i. e ILS, TVOR and VOR 2: The identification of the facility 3: The number of the DME of TACAN channel paired 4: The code of the country operating the facility 5: The place name of the facility 6: The type of equipment 7: The coordinates of the facility [as column 5 of part 1] 8: is as column 7 of part 1 9, 10, 11, 12 13 is as columns 8, 9, 10, 11 and 12 in part 1

PART III List of facilities which have been taken out of service.

COM List No. 3 • List of facilities operating in frequency band 117. 975 -137 MHz • APIRG/13 adopted the following VHF Frequency Utilization Plan in accordance with AFI/7 [ Abuja, 12 -23 May 1997] Recommendation 9/11.

GEOGRAPHICAL SEPARATION FOR CO-CHANNEL VHF ASSIGNMENTS Area Control or Flight Information (upper) ACC – U or FIS – U Specified area plus 50 NM 13700/45000 or 19800/65000 520 (2) 630 (2) Area Control or Flight Information (low) ACC – L or FIS – L Specified area plus 50 NM 7600/25000 500 (2) Area Control Information (extended range) ACC – ER or FIS – ER To be specified VOLMET Omni-directional VOLMET • • (1) (2) (3) (4) 13700/45000 or 9800/65000(3) 13700/45000 or 19800/65000(3) Distance between Stations Distance between, limits of service areas If required for SST Operations Applicable to the AFI Region only 1000 (1) (4) 1200 (1) 520 (2) 660 (2)

Part I consists of the list of facilities in the order of States LOCATION 1 ADRAR/ ADRAR ALGER • • Freq. MHz 2 119. 700 123. 800 Column Column 1: 2: 3: 4: 5: 6: 7: 8: SERVICE COORDINATES 3 4 TWR ACC/L 2750 N 011 W 3642 N 0313 E PROT GP CAT VHF OP 5 6 ICAO 7 OP REMARKS 8 OP 06 -18 SOUTH Country and place name of the location of the facility Frequency in MHz Service abbreviation Geographical coordinates Protection group Category of the facility [ICAO /National] Implementation and operational status Remarks Part 11 consist of the list of facilities classified by the order of frequencies of operation.

AFI COM List No. 3 by frequency order/ Liste AFI COM n° 3 par ordre des fréquences FREQ. LOCATION 112. 100 LIBREVILLE/ GAB LEON M’BA 112. 50 DURBAN/ LOUIS BOTHA CODE SERVICE COORDINATES VOLMET 0027 N 0925 E AFIS ATIS CAT. PROT GP ICAO 2958 S 3057 E OP VHFOP REMARKS OP ATIS NAT Due to scarcity of spectrum the Regional Offices are in constant dialogue with States to update the COM List so that reuse of the spectrum is possible.

Difficulties in updating the COM LISTs • Inadequate information from States • Constant changes in names of aerodromes • Reuse of frequencies without consultation with the Regional Office.

Future Spectrum Management in AFI • Promotion of ICAO positions at ITU WRCs • Updating of guidance material contained in ICAO Doc 9718 • Development of appropriate software to be made available to the States in order to provide them with direct and automated assistance to frequency planning, access to information and data on frequencies used. • Hopefully it will lead to improved frequency utilization.