Arrangement D

Arrangement Between the Department of Transport and the Interdepartment Radio Advisory Committee for the Exchange of Frequency Assignment Information and Engineering Comments on Proposed Assignments Along the Canada-United States Borders in Certain Frequency Bands Above 30 Mc/s

(Adopted Washington, D.C., June 1956; revised Ottawa, March 1962, and Washington, D.C., October 1964)

  1. This arrangement provides for the exchange of frequency assignment information and engineering comments on proposed assignments in the following frequency bands:
    1. Mc/s
      32.00–33.00
      34.00–35.00
      36.00–37.00
      38.00–39.00
      40.00–42.00

      148.00–149.60
      150.05–150.80
      162.00–174.00

      Mc/s
      1710.00–1850.00
      2200.00–2290.00
      4400.00–4990.00
      7125.00–7250.00
      7750.00–7900.00
    2. Mc/s
      2110.00–2120.00
      7250.00–7750.00
      7900.00–8400.00
  2. (a) For the bands below 1000 Mc/s, the areas involved are those bounded by:

    Line A — Begins at Aberdeen, Wash. running by great circle arc to the intersection of 48° N., 120° W., thence along parallel 48°N., to the intersection of 95°W., thence by great circle arc through the southernmost point of Duluth, Minn., thence by great circle arc to 45°N., 85°W., thence southward along meridian 85°W., to its intersection with 41° N., thence along parallel 41° N., to its intersection with meridian 82° W., thence by great circle arc through the southernmost point of Bangor, Me., thence by great circle arc through the southernmost point of Searsport, Me., at which point it terminates; and

    Line B — Begins at Tofino, B.C., running by great circle arc to the intersection of 50°N., 125°W., thence along parallel 50°N., to the intersection of 90°W., thence by great circle arc to the intersection of 45°N., 79° 30' W., thence by great circle arc through the northernmost point of Drummondville, Quebec (Lat: 45°52' N., Long: 72° 30' W.), thence by great circle arc to 48° 30' N., 70° W., thence by great circle arc through the northernmost point of Campbellton, N.B., thence by great circle arc through the northernmost point of Liverpool, N.S., at which point it terminates.

    Line C — Begins at the intersection of 70°N., 144°W., thence by great circle arc to the intersection of 60° N., 143° W., thence by great circle arc so as to include all of the Alaskan Panhandle; and

    Line D — Begins at the intersection of 70°N., 138°W., thence by great circle arc to the intersection of 61° 20' N., 139° W. (Burwash Landing), thence by great circle arc to the intersection of 60° 45' N., 135° W., thence by great circle arc to the intersection of 56°N., 128°W., thence south along 128°W. meridian to Lat. 55° N., thence by great circle arc to the intersection of 54° N., 130° W., thence by great circle arc to Port Clements, thence to the Pacific Ocean where it ends.

    (b) For any station of a terrestrial service using a band above 1000 Mc/s, the areas involved are as follows:
    1. For a station the antenna of which looks within the 200°sector toward the Canada-United States borders, that area in each country within 35 miles of the borders;
    2. For a station the antenna of which looks within the 160° sector away from the Canada-United States borders, that area in each country within 5 miles of the borders; and,
    3. The area in either country within the coordination distance (paragraph 8) of a receiving earth station in the other country which uses the same band.
    (c) For bands above 1000 Mc/s, coordination of an earth station is required if any portion of the Canada-United States borders lies within the coordination distance (paragraph 8) of the earth station.
  3. Current records of frequency assignments in the frequency bands listed in paragraph 1 will be exchanged as required.
  4. (a) Before either Agency takes final action on any proposal for the use of any frequency, other than for military tactical and training operations in the bands listed in paragraph 1(a), in the areas stipulated in paragraph 2:
    1. in the bands below 1000 Mc/s, listed in paragraph 1, involving power in excess of 5 watts; or,
    2. in the bands above 1000 Mc/s, listed in paragraph 1;

      it will refer the pertinent particulars of the proposed assignment (see Appendix 1, 2 or 3, as appropriate) to the other Agency for comment on whether the granting of an authorization will be liable to result in the causing of harmful interference to any existing radio operations of the Agency whose views are sought, or, in the case of a receiving earth station, whether harmful interference would be caused to reception at the earth station by any existing radio operations of the Agency whose views are sought.
    (b) If adverse comment is not received within 30 calendar days from the date of the receipt of the proposal, the initiating Agency may go ahead with the operation after having notified the other Agency. In an emergency, coordination may be effected after the assignment is put into operation.

    (c) Neither the Interdepartment Radio Advisory Committee or the Department of Transport shall be bound to act in accordance with the views of the other. However, to keep such instances to a minimum, each Agency should cooperate to the fullest extent practicable with the other by furnishing such additional data as may be required.
  5. In cases where the information available makes it difficult to determine whether harmful interference would be created by the granting of a particular authorization, arrangements may be made for actual on-the-air tests to be observed by representatives of each Agency and further exchanges of engineering comments following such tests.
  6. In the interest of planned use of the spectrum, information about future expansions and adjustments of the service allocated the use of the bands listed in paragraph 1, in the areas stipulated herein, may be exchanged to the maximum extent practicable.
  7. Where a previously coordinated frequency assignment is in use and an additional assignment is proposed for the same frequency in the same area, the additional assignment must also be coordinated, attention being drawn to the previous coordination. This does not apply to the addition of mobile units to a previously coordinated land mobile system.
  8. Coordination distance shall be the distance, calculated for any station, according to Recommendation 1A of the Final Acts of the EARC, Geneva, 1963.

Appendix 1 to Arrangement D

Basic Data Required for the Coordination of Terrestrial Stations in the Bands Below 1000 Mc/s

  1. Class of station
  2. Number of stations (including, when available, number of mobile stations)
  3. Location and coordinates
  4. Frequency
  5. Power (mean) delivered to the antenna
  6. Class of emission and necessary bandwidth
  7. Antenna gain (dB) and azimuth, when available
  8. Antenna elevation in ft. above mean sea level (MSL), when available

Appendix 2 to Arrangement D

  1. Class of station
  2. Number of stations (including, when available, number of mobile stations)
  3. Location and coordinates
  4. Frequency
  5. Power (mean) delivered to the antenna
  6. Class of emission and necessary bandwidth
  7. Antenna gain (dB) and azimuth, when available
  8. Antenna elevation in ft. above mean sea level (MSL), when available
  9. Polarization of transmitted wave
  10. Topographic map of territory between stations at fixed locations and the Canada-United States borders (required only for stations within the coordination distance of a previously coordinated earth station which uses the same band)

Appendix 3 to Arrangement D

Basic Data Required for the Coordination of Earth Stations in the Space Service

  1. Class of station
  2. Number of stations (including, when available, number of mobile stations)
  3. Location and coordinates
  4. Azimuthal and elevation coverage of celestial hemisphere as defined by main axis of antenna
  5. Class of emission and necessary bandwidth
  6. Power (mean) delivered to the antenna and, where applicable, estimated terminal coupling losses
  7. Maximum gain of antenna in the horizontal plane as a function of azimuth
  8. Maximum gain of antenna (referred to isotropic)
  9. Antenna elevation in ft. above mean sea level (MSL)
  10. Polarization of transmitted wave
  11. Topographic map of territory between earth station and Canada-U.S. borders in the sector wherein the coordination distance exceeds the distance to the border
  12. Numerical values of terrain shielding in the pertinent directions
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