TRAA

Spectrum Management Terrestrial Radiocommunication Agreements and Arrangements

U.S./Canada Interim Channelling Arrangement for the Aeronautical Mobile (R) Service Utilizing 25 kHz Channels for the Band 136-137 MHz

Note All persons making use of this consolidation are reminded that the documents included herein are provided only for convenience of reference. This consolidation is for the guidance of those engaged in radiocommunications in Canada. The information contained in this document is subject to change without notice. While every reasonable effort has been made to ensure accuracy, no warranty is expressed or implied. For more details, please contact the Terrestrial Services Frequency Management Division (International Systems). The agreements and arrangements contained herein have been negotiated under the authority of the Government of Canada by the Department of Communications whose spectrum management and telecommunications programs have been transferred to Industry Canada. All notes in square brackets [ ] were added for clarification purposes. Prepared by: Industry Canada Radio Regulatory Branch 300 Slater Street Ottawa, Ontario K1A 0C8

Publication Date: December 1993

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TRAA

FEDERAL COMMUNICATIONS COMMISSION WASHINGTON, DC 20554 November 1, 1991 In reply refer to: 7240 Mr. Michael Binder Assistant Deputy Minister Research and Spectrum Department of Communications 300 Slater Street Ottawa, Ontario K1A 0C8 Canada Dear Mr. Binder: The Department of Communications (DOC) of Canada has assisted the Federal Communications Commission (FCC) of the United States of America in developing a sharing arrangement for the aeronautical service in the 136-137 MHz band. Discussions have taken place between representatives from both countries. On behalf of Ralph A. Haller, the Chief of the Private Radio Bureau, I am forwarding for your consideration an arrangement which we believe will satisfy both countries' spectrum needs in the 136-137 MHz band. This arrangement would apply provisionally until the definitive entry into force of a replacement for the Agreement Concerning the Coordination and Use of Radio Frequencies Above 30 Megacycles per Second, with Annex (Above 30 MHz Agreement), as amended.1 We are prepared to undertake such a revision as part of an overall review and update of the Above 30 MHz Agreement. Please confirm your acceptance of the attached arrangement as an understanding between our two agencies until revision of the Above 30 MHz Agreement can be concluded. Sincerely, Bruce A. Franca

1. Exchange of Notes at Ottawa, October 24, 1962. Entered into force October 24, 1962. USA: Treaties and Other International Acts Series (TIAS 5205); CAN: Canada Treaty Series (CTS) 1962 No. 15. Agreement Revising the Technical Annex to the Agreement of October 24, 1962 (TIAS 5205/CTS 1962 No. 15). Effected by Exchange of Notes at Ottawa, June 16 and 24, 1965. Entered into force June 24, 1965. USA: TIAS 5833/CAN: CTS 1962 No. 15. 1

136.000-137.000 MHz

TRAA

Deputy Chief Engineer Enclosure

CONFIRMATION

OF

ACCEPTANCE

The attached arrangement between the Department of Communications of Canada and the Federal Communications Commission entitled U.S./Canada Interim Channelling Arrangement for the Aeronautical Mobile (R) Service Utilizing 25 kHz Channels for the Band 136-137 MHz is accepted as an understanding between our two agencies. This Arrangement will become effective on January 2, 1992 and is to be applied provisionally until the definitive entry into force of a replacement for the Agreement Concerning the Coordination and Use of Radio Frequencies Above Thirty Megacycles per Second, with Annex, as amended.

___________________________ Michael Binder Assistant Deputy Minister Research and Spectrum Department of Communications

___________________________ Ralph A. Haller Chief, Private Radio Bureau Federal Communications Commission

Date: January 15, 1992

Date: November 1, 1991

2

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TRAA

U.S./CANADA INTERIM CHANNELLING ARRANGEMENT FOR THE AERONAUTICAL MOBILE (R) SERVICE UTILIZING 25 KHZ CHANNELS FOR THE BAND 136-137 MHZ 1. The provisions of this Arrangement apply to the Federal Communications Commission of the United States and the Department of Communications of Canada (the Administrations) regarding use of the 25 kHz channels in the 136-137 MHz frequency band that appear in paragraph 2 below. 2. These 25 kHz channels are allotted as follows: Freq. (MHz)

U.S.

CANADA

136.000 136.025 136.050 136.075

X X X X

X X X X

136.100 136.125 136.150 136.175

X X X X

X X X X

136.200 136.225 136.250 136.275

X X X X

X X X X

136.300 136.325 136.350 136.375

X X X X

X X X X

136.400 136.425 136.450 136.475

X X X X

X X X X

136.500 136.525 136.550 136.575

X X X

X

136.600 136.625 136.650 136.675

X X X

X

X X

X X

3

136.000-137.000 MHz

Freq. (MHz)

TRAA

U.S.

CANADA

136.700 136.725 136.750 136.775

X X X

X

136.800 136.825 136.850 136.875

X X X

X

136.900 136.925 136.950 136.975

X X X

X

X X

X X

X X

Note 1:

Frequencies primarily allotted for use by the United States may also be assigned to Canadian stations within the frequency coordination zones listed in Attachment A following successful coordination with the United States.

Note 2:

Frequencies primarily allotted for Canadian use may also be assigned to United States stations within the frequency coordination zones listed in Attachment A following successful coordination with Canada.

Note 3:

All frequencies listed in paragraph 2 may be assigned without prior coordination outside the coordination zones listed in Attachment A.

Note 4:

The frequencies 136.000 MHz through 136.475 MHz allocated for air traffic control (ATC) purposes will be shared on an equal basis without prejudging the needs of either Administration.

Note 5:

The frequencies 136.000 MHz through 136.475 MHz will be coordinated on the basis of required technical data as established in the October 24, 1962, agreement entitled TELECOMMUNICATIONS-Coordination and Use of Radio Frequencies Above 30 Megacycles per Second and any subsequent revisions thereto.

3. For frequencies 136.500 MHz through 136.975 MHz that are within the frequency coordination zones listed in Attachment A, the Administrations shall coordinate assignments of all frequencies allocated jointly to both Administrations. 4. In adopting this Arrangement, it is understood by the Administrations that: each Administration retains complete flexibility in making use of its channels within the frequency coordination zone(s); the option provided by Notes 1 and 2 of Paragraph 2 should not be exercised unless a requirement cannot be satisfied on a channel allotted to that Administration under the plan; an assignment made under the provisions of Notes 1 and 2 should not be a bar to future use of the channel by the Administration to which it is allocated 4

136.000-137.000 MHz

TRAA

in paragraph 2 above; consideration shall be given to the overall frequency utilization in the area of the proposed station. 5. Before an Administration assigns a frequency allotted to the other Administration, it shall establish that neither the frequencies primarily allotted to it nor the frequencies allotted jointly are available. Before an Administration requests the return of one of its allotted frequencies, it shall establish that it cannot otherwise meet its operational requirements. Where a determination indicates congestion of equal magnitude, consideration shall be given to the sharing of a frequency on an equal basis by the two countries. In cases where such determination indicates greater congestion in the area of the proposed station, the frequency shall be returned to the Administration to which the channel is allotted. 6. This Arrangement takes cognizance of pertinent provisions promulgated by the 1979 and 1987 World Administrative Radio Conferences (WARC). Specifically, the 1979 WARC reallocated world-wide the use of the 136-137 MHz band, effective January 2, 1990, to the aeronautical mobile (R) service on a primary basis, and to the space operation, meteorological satellite, space research, fixed and other mobile services on a secondary basis. Subsequently, the 1987 Mobile WARC, in Resolution 408, resolved that as of January 1, 1990, administrations operating stations on a secondary basis in this band take steps to protect the aeronautical mobile (R) service. Additionally, the 1987 Mobile WARC requested that as of the same date, administrations refrain from authorizing new assignments to the services to which the band is allocated on a secondary basis. In recognition of the foregoing, the Administrations agree to make no new assignment after January 1, 1992 to stations of the services to which the band is allocated on a secondary basis and to cease operation of any preexisting stations in such secondary services if their operation causes interference2 to stations of the aeronautical mobile (R) service, to which the band is allocated on a primary basis. 7. This Arrangement shall be subject to review after five years. In this regard, the Administrations shall exchange information as to frequency assignments annually. 8. This Arrangement is of an interim nature pending incorporation into a replacement for the Agreement Concerning the Coordination and Use of Radio Frequencies Above 30 Megacyles per Second, with Annex as amended.

2. See Radio Regulations, International Telecommunication Union (ITU), Sec. VII Sec. 7.1, para. 160 (1982 ed., rev, 1985 & 1986) (Definition of Interference). 5

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TRAA

ATTACHMENT A FREQUENCY COORDINATION ZONES FOR CO-CHANNEL ASSIGNMENTS

Type of Station

Altitude Level (Feet)

Ramp (RT

)

Helicopter

Coordination Zone* (Nautical Miles)

Ground Level

50

(HO)

0 to 2,000

150

Low Level

(LL)

0 to 10,000

250

Mid Level

(ML)

0 to 20,000

400

High Level

(HL)

Over 20,000

600

* The Coordination Zone is t he distance from the U.S./Canada border.

6

Canada - aviation freqs - 136-137E.PDF

Spectrum Management. Terrestrial Radiocommunication Agreements and Arrangements. U.S./Canada Interim Channelling. Arrangement for the Aeronautical.

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