(1) The call sign or other identification of the station sending the distress message, spoken three times;

(2) The words THIS IS;

(3) The call sign or other identification of the station acknowledging receipt, spoken three times;

(4) The word RECEIVED;

(5) The distress signal MAYDAY. § 83.241 Information furnished by acknowledging station.

(a) Every mobile station which acknowledges receipt of a distress message shall, on the order of the master or person responsible for the ship, aircraft, or other vehicle carrying such mobile station, transmit as soon as possible the following information in the order shown:

(1) Its name;

(2) Its position, in the form prescribed in § 83.236(c);

(3) The speed at which it is proceeding towards, and the approximate time it will take to reach, the mobile station in distress.

(b) Before sending this message, the station shall ensure that it will not interfere with the emissions of other stations better situated to render immediate assistance to the station in distress. § 83.242 Transmission of distress message by a station not itself in distress. (a) A mobile station or a land station which learns that a mobile station is in distress shall transmit a distress message in any of the following cases:

(1) When the station in distress is not itself in a position to transmit the distress message;

(2) When the master or person responsible for the ship, aircraft, or other

vehicle not in distress, or the person responsible for the land station, considers that further help is necessary;

(3) When, although not in a position to render assistance, it has heard a distress message which has not been acknowledged. When a mobile station transmits a distress message under these conditions, it shall take all necessary steps to notify the authorities who may be able to render assistance.

(b) The transmission of a distress message under the conditions prescribed in paragraph (a) of this section shall be made on either or both of the international distress frequencies (500 kc/s radiotelegraph; 2182 kc/s radiotelephone) or on any other available frequency on which attention might be attracted.

(c) The transmission of the distress message shall always be preceded by the call indicated below, which shall itself be preceded whenever possible by the radiotelegraph or radiotelephone alarm signal. This call consists of:

(1) When radiotelegraphy is used:

(i) The signal DDD SOS SOS SOS DDD;

(ii) The word DE;

(iii) The call sign of the transmitting station, sent three times. (2) When radiotelephony is used: (i) The signal MAYDAY RELAY, spoken three times;

(ii) The words THIS IS;

(iii) The call sign or other identification of the transmitting station, spoken three times.

(d) When the radiotelegraph alarm signal is used, an interval of two minutes shall be allowed, whenever this is considered necessary, before the transmission of the call mentioned in subparagraph (c) (1) of this section.

§ 83.243

Control of distress traffic.

(a) Distress traffic consists of all messages relating to the immediate assistance required by the mobile station in distress. In distress traffic, the distress signal shall be sent before the call and at the beginning of the preamble of any radiotelegram.

(b) The control of distress traffic is the responsibility of the mobile station in distress or of the station which, pursuant to § 83.242(a), has sent the distress message. These stations may, however, delegate the control of the distress traffic to another station.

(c) The station in distress or the station in control of distress traffic may impose silence either on all stations of the mobile service in the area or on any station which interferes with the distress trafc. It shall address these instructions "to all stations" or to one station only, according to circumstances. In either case, it shall use:

(1) In radiotelegraphy, the abbreviation QRT, followed by the distress signal SOS. The use of the signal QRT SOS shall be reserved for the mobile station in distress and for the station controlling distress traffic;

2 In radiotelephony, the signal SEELONCE MAYDAY. The use of this signal shat be reserved for the mobile station in distress and for the station controlling distress traffic.

(d) If it is believed to be essential, any station of the mobile service near the ship, aircraft, or other vehicle in distress, may also impose silence. It shall use for this purpose:

(2) In radiotelegraphy, the abbreviation QRT, followed by the word DISTRESS and its own call sign;

(2) In radiotelephony, the word SEELONCE, followed by the word DISTRESS and its own call sign or other identication.

§ 83.244 Notification of resumption of normal working.

(a) When distress traffic has ceased, or when silence is no longer necessary on a frequency which has been used for distress traffic, the station which has controlled this traffic shall transmit on that frequency a message addressed "to all stations" indicating that normal working may be resumed.

(1) In radiotelegraphy, this message COLELELS of:

(C) The distress signal S03; (The call to all stations" (CQ), sent three times;

The word DE;

(iv) The call sign of the station sending the message;

(v) The time of banding in of the message:

The name and call sign of the mobile station which was in distress: (vi) The service abbreviation QUM (2) In radiotelephony, this message consists of:

The distress signal MAYDAY: (E) The call to all stations", spoken three times;

(ii) The words THIS IS;

(iv) The call sign or other identifica tion of the station sending the message; (V) The time of handing in of the message:

(V) The name and call sign of the mobile station which was in distress:

(VID) The words SEELONCE PRENEL (b) Until they receive the foregoing message indicating that normal working may be resumed, all stations which are aware of the distress traffic, and winch are not taking part in it, are forbidden to transmit on the frequencies on which the distress traffic is taking place. §83.245 Radiotelegraph and radiotzie phone alarm signals.

(a) The international radiotelegraph alarm signal consists of a series of twelve dashes sent in one minute, the duramon of each dash being four seconds and the duration of the interval between consecutive dashes one second. The purpose of this special signal is the actuation sí automatic devices giving the alarm to attract the attention of the operator

when there is no listening watch on the

distress frequency.

(b) The international radiotelephone alarm signal consists of two substanmally sinusoidal audio frequency tones tranemited alternately. One tone shall have a frequency of 2200 cycles per second and the cider a frequency of 1300 cycles per second, the duration of each tone being 250 milliseconds. When generated by automatic means, the radiotelephone alarm signal shall be transmitted continuously for a period of at least 30 seconds, but not exceeding one m

when generated by other means, the sug

nal shall be transmitted as occtioULT as practicable over a period of appronmately one minute The purpose of this special signal is to attract the attemnen of the person on watch or to actuate automatic devices giving the alarm. § 83.246 Lie of alarm signals.

(a) The radiotelegraph or radiotalephone alarm signal, as appropriate, shaI only be used to announce:

(1) That a distress call or message is about to folow;

(2) The transmission of an urgent cyclone warning. In this case the sport signai may only be used by coast sta tons authorized by the Commission to do so; cr

(3) The loss of a person or persons overboard. In this case the alarm sCL

may only be used when the assistance of other ships is required and cannot be satisfactorily obtained by the use of the urgency signal only, but the alarm signal shall not be repeated by other stations. The message shall be preceded by the urgency signal.

(b) In cases described in subparagraphs (2) and (3) of paragraph (a) of this section, the transmission of the warning or message by radiotelegraphy shall not begin until two minutes after the end of the radiotelegraph alarm signal.

§ 83.247 Urgency signals.

(a) The urgency signal indicates that the calling station has a very urgent message to transmit concerning the safety of a ship, aircraft, or other vehicle, or the safety of a person. The urgency signal shall be sent only on the authority of the master or person responsible for the mobile station.

(b) In radiotelegraphy, the urgency signal consists of three repetitions of the group XXX, sent with the individual letters of each group, and the successive groups clearly separated from each other. It shall be transmitted before the call.

(c) In radiotelephony, the urgency signal consists of the word PAN, spoken three times and transmitted before the call.

(d) The urgency signal shall have priority over all other communications, except distress. All mobile and land stations which hear it shall take care not to interfere with the transmission of the message which follows the urgency signal.

§ 83.248 Urgency message.

(a) The urgency signal and call, and che message following it, shall be sent on one of the international distress frequencies (500 kc/s radiotelegraph; 2182 c/s radiotelephone), or on the national Histress frequency (156.800 Mc/s radioelephone). However, stations which annot transmit on a distress frequency may use any other available frequency on hich attention might be attracted.

(b) Mobile stations which hear the rgency signal shall continue to listen or

at least three minutes. At the end f this period, if no urgency message has een heard, they may resume their noral service. However, land and mobile cations which are in communication on requencies other than those used for the

transmission of the urgency signal and of the call which follows it may continue their normal work without interruption provided the urgency message is not addressed "to all stations" (CQ).

(c) When the urgency signal has been sent before transmitting a message "to all stations" (CQ) and which calls for action by the stations receiving the message, the station responsible for its transmission shall cancel it as soon as it knows that action is no longer necessary. This message of cancellation shall likewise be addressed "to all stations" (CQ).

[28 F.R. 14030, Dec. 21, 1963, as amended at 33 F.R. 10861, July 31, 1968]

§ 83.249 Safety signals.

(a) The safety signal indicates that the station is about to transmit a message concerning the safety of navigation or giving important meteorological warnings.

(b) In radiotelegraphy, the safety signal consists of three repetitions of the group TTT, sent with the individual letters of each group, and the successive groups clearly separated from each other. It shall be sent before the call.

(c) In radiotelephony, the safety signal consists of the word SECURITY, spoken three times and transmitted before the call.

(d) The safety signal and call shall be sent on one of the international distress frequencies (500 kc/s radiotelegraph; 2182 kc/s radiotelephone), or on the national distress frequency (156.800 Mc/s radiotelephone). However, stations which cannot transmit on a distress frequency may use any other available frequency on which attention might be attracted.

[28 F.R. 14030, Dec. 21, 1963, as amended at 33 F.R. 10861, July 31, 1968] § 83.250 Safety message.

(a) The safety signal and call shall be followed by the safety message. Where practicable, the safety message should be sent on a working frequency, and a suitable announcement to this effect shall be made at the end of the call.

(b) Except for the cases mentioned in paragraph (c) of this section, the safety signal when sent on the frequency 500 kc/s shall be transmitted towards the end of the first available period of silence; the safety message shall be transmitted immediately after the period of silence.

(c) Messages containing meteorological warnings, or containing information concerning the presence of cyclones, dangerous ice, dangerous wrecks, or any other imminent danger to marine navigation, shall be preceded by the safety signal and transmitted with the least possible delay to other mobile stations in the vicinity, and to the appropriate authorities at the first point of the coast with which contact can be established.

(d) All stations hearing the safety signal shall listen to the safety message until they are satisfied that the message is of no concern to them. They shall not make any transmission likely to interfere with the message.

Subpart K-Foreign Ship Stations in

United States Waters

SOURCE: The provisions of this Subpart K appear at 28 FR. 14033. Dec. 21, 1963, unless otherwise noted.

§ 83.262 Applicability of Part II of Title III of Communications Act. Those provisions of part II of title of the Communications Act which require an efficient radio station in cperating condition in charge of and operated by one or more radio cfficers or operators, and with efficient radio direction finding apparatus, are applicable to a ship of any foreign country when such ship leaves or attempts to leave any harbor or port of the United States for a voyage in the open sea, except as otherwise provided by section 352 a) of the said Act.

83.263 Limitations on transmission.

(a) Sections 301 and 318 of the Communications Act, relative to station censes and operator licenses respectively, are not applicable to any person sending radiocommunications or signals on a foreign ship while the same is within the jurisdiction of the United States; how

ever, such communications or signals shall be transmitted only in accordance with applicable rules of the Commission intended to prevent interference including, among others, the following subparagraphs:

(1) The frequency or frequencies and the class or classes of emission used shall be available for the operation being conducted pursuant to the allocation of frequencies to radio services and the use of classes of emission established by the International Radio Regulations and pursuant to the terms of all other applicable international treaties and agreements to which the United States is a party;

(2) The operation of the radio apparatus shall not cause interference with the normal communications of other rado services, and only the minimum power necessary for effective communica noc shall be used:

(3) The station shall comply with the applicable provisions of the International Radio Regulations and other applicable international treaties and agreements to which the United States is a party;

(4) The operation of transmitting apparatus employing B emission is prohibited in any harbor or port of the United States, except that such emiss.cm may be used until January 1, 1966 for distress calls and distress traffic only.

.b Any transmission by a station on board a foreign man-of-war shall addition to the provisions of paragrapo (a) of this section, be governed alsC OF the following provisions:

1) Transmission by radio from any foreign man-of-war while the same 3 within the territoria. waters of the United States is prohibited unless &: thorized by appropriate United States authorines and carried on in conform with the provisions of paragraph & this section Normally a request from a foreign man-of-war to use its race transmitting apparatus while in Unned States ports and territorial waters shall be made to one of the United States naval district commandants or. after arrival in port to the senior Caled States Navy Ccer present When Navy Offer is not present rences C be made to the port authorities, or to the United States Navy at Washing D C

NOTE: The beadquarters of District Com mandants concerned are located at Boston New York, Philadelphia Norfolk: ChaTUMHICO,

No charge shall be made by any ship or station in the mobile service of the United States for the transmission of distress messages and replies thereto in connection with situations involving the safety of life and property at sea.

§ 83.272 Danger messages.

No charge shall be made by any ship station or other station in the maritime mobile service of the United States for the transmission, receipt, or relay of the information concerning dangers to navigation designated in 83.303(b), originating on a ship of the United States or of a foreign country.

§ 83.273 Tariff filing required.

No charge shall be made for the service of any station on board ship subject to this part unless effective tariffs applicable to such service are on file with the Commission, pursuant to the requirements of section 203 of the Communications Act and Part 61 of this chapter. § 83.274 Responsibility for payment.

(a) Each ship station shall be responsible for the payment of all charges accruing to any other station(s) or facilities for the handling or forwarding of messages or communications transmitted by that station.

(b) The transmission by any ship station of information concerning dangers to navigation, made in compliance with the provisions of § 83.303(b), to any station which imposes a charge for the reception, relay, or forwarding of the required information, shall be free of cost to the ship concerned and any communication charges incurred by the ship for transmission, relay, or forwarding of the information may be certified to the Commission for reimbursement out of moneys appropriated to the Commission for that purpose.

§ 83.275 Ship position reports.

Any common carrier subject to the Communications Act may furnish reports of positions of ships at sea to newspapers of general circulation, either at a nominal charge or without charge, provided the name of such common carrier is displayed along with such ship position reports.

§ 83.276 Free safety service.

Notwithstanding any other provision of law, any ship station may render free service in connection with situations involving the safety of life and property, including hydrographic reports, weather reports, reports regarding aids to navigation and medical assistance to injured or sick persons on ships and aircraft at sea: Provided, That the Commission, from time to time under particular circumstances, may impose specific limitations on such free service to the extent that it finds desirable in the public interest. § 83.277 Free service for national de

fense.

Any common carrier subject to the Communications Act may render to any agency of the United States Government free service in connection with the preparation for the national defense. Every such carrier rendering any such free service shall make and file in duplicate, with the Commission, on or before the 31st day of July and on or before the 31st day of January in each year, reports covering the periods of 6 months ending on the 30th day of June and the 31st day of December, respectively, next prior to said dates. These reports shall show the names of the agencies to which free service was rendered pursuant to this paragraph, the general character of the communications handled for each agency, and the charges in dollars which would have accrued to the carrier for such service rendered to each agency if charges for all such communications had been collected at the published tariff rates

Subpart M-Nature of Service Provided by Ship Stations and Shipboard Marine-Utility Stations SOURCE: The provisions of this Subpart M appear at 28 F.R. 14034, Dec. 21, 1963, unless otherwise noted.

§ 33.301 Supplemental eligibility re

quirements.

(a) Subject to the basic eligibility requirements set forth in § 83.23, au