47 CFR §80.379

1. (a)Available frequencies:
2. (b)The conditions of use of the carrier frequencies in paragraph (a) of this section, are:
   1. (1)For permissible geographic areas of operation see § 80.373(b)(1). For other limitations see § 80.373(b)(7);
   2. (2)Aircraft and ship stations may use 3023.0 kHz and 5680.0 kHz for search and rescue scene-of-action coordination including communications between these stations and participating land stations. Stations using these frequencies must use J3E emission;
   3. (3)Assignable for distress and safety communications between aircraft and maritime mobile stations;
   4. (4)Assignable for search and rescue between ships and aircraft. Stations using these frequencies must use A3E emission;
   5. (5)These frequencies may be used by aircraft stations when:
      1. (i)The altitude of aircraft stations does not exceed 300 meters (1,000 feet), except for reconnaissance aircraft participating in icebreaking operations where an altitude of 450 meters (1,500 feet) is allowed;
      2. (ii)The mean power of aircraft stations must not exceed five watts;
      3. (iii)Communications are limited to operations in which the maritime mobile stations are primarily involved and where direct communications between the aircraft and the ship or coast station is required;
      4. (iv)Stations may use 156.300 MHz for safety purposes only;
      5. (v)Stations may use 156.800 MHz for distress, safety and calling only; and
      6. (vi)Use of 156.375 MHz by aircraft is not permitted in the New Orleans VTS area specified in § 80.383.
   6. (6)The use of 157.100 MHz is limited to communications with stations of the Department of Interior at Lake Mead, Nevada; and
   7. (7)Commercial fishing vessels and associated aircraft may use 157.425 MHz while engaged in commercial fishing activities except within 120 km (75 miles) of the United States/Canada border and Puget Sound and the Strait of Juan de Fuca and its approaches, the Great Lakes, and the St. Lawrence Seaway.