§ 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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Ship Earth Stations

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