§ 80.375   Radiodetermination frequencies.

   This section describes the carrier frequencies assignable to
   radiodetermination stations. Only direction finding radar stations will
   be authorized on land.

   (a) Direction finding frequencies. The carrier frequencies assignable
   to ship stations for directional finding operations are:

Carrier Frequency

   8364 kHz

   121.500 MHz

   243.00 MHz

   (b) Radiodetermination frequencies for cable-repair ships. Except in
   Region 1 the channels in the 285-325 kHz band are assignable to ship
   stations for cable-repair radiodetermination operations. In Region 1
   the channels available for assignment for such operations are limited
   to the 285-315 kHz band. The conditions of use of these channels are
   set forth in subpart X of this part. Channel usage must comply with the
   following requirements:

   (1) They are not permitted within the territorial waters of a foreign
   country;

   (2) Their output power must not exceed 15 watts; and

   (3) They must not cause interference to any maritime station in the
   radionavigation service.

   (c) Radiodetermination frequencies below 500 MHz. The frequencies
   154.585 MHz, 159.480 MHz, 160.725 MHz, 160.785 MHz, 454.000 MHz and
   459.000 MHz are authorized for offshore radiolocation and associated
   telecommand operations under a ship station license provided:

   (1) The use of these frequencies is related to the ship's commercial
   operations;

   (2) The station antenna height does not exceed 6 meters (20 feet) above
   sea level in a buoy station or 6 meters (20 feet) above the mast of the
   ship in which it is installed.

   (d) Radiodetermination frequency bands above 2400 MHz. (1) The
   radiodetermination frequency bands assignable to ship and shore
   stations including ship and shore radar and transponder stations are as
   follows: 2450-2500 MHz; 2900-3100 MHz; 5460-5650 MHz; and 9300-9500
   MHz.

   (2) Assignment of these bands to ship and coast stations are subject to
   the following conditions:

   (i) The 2450-2500 MHz band may be used only for radiolocation on the
   condition that harmful interference must not be caused to the fixed and
   mobile services. No protection is provided from interference caused by
   emissions from industrial, scientific, or medical equipment;

   (ii) The use of the 2900-3100 MHz, 5470-5650 MHz and 9300-9500 MHz
   bands for radiolocation must not cause harmful interference to the
   radionavigation and Government radiolocation services. Additionally,
   the use of the 2900-3000 MHz band for radiolocation must not cause
   harmful interference to the Government meteorological aids service.

   (iii) In the 2920-3100 MHz and 9320-9500 MHz bands the use of
   fixed-frequency transponders for radionavigation is not permitted;

   (iv) Non-Government radiolocation stations may be authorized in the
   5460-5470 MHz band on the condition that harmful interference shall not
   be caused to the aeronautical or maritime radionavigation services or
   to Government radiolocation service;

   (v) The use of the 5460-5650 MHz band for radionavigation is limited to
   shipborne radar.

   (e) Search and rescue radar transponder stations. The technical
   standards for search and rescue transponder stations are in subpart W
   of this part.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  52 FR 7419 , Mar. 11, 1987;
    55 FR 6394 , Feb. 23, 1990;  57 FR 26779 , June 16, 1992;  58 FR 44953 ,
   Aug. 25, 1993;  68 FR 46970 , Aug. 7, 2003;  76 FR 67615 , Nov. 2, 2011]

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