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Shipboard stations.




service or any service other than for general public correspondence established in conformity with the provisions of the Convention, provided such wave lengths do not exceed 600 meters or that they do exceed 1,600 meters.


1. The normal wave length for stations on shipboard shall be 300 meters. Every station on shipboard shall be installed in such manner as to be able to use this wave length. Other wave lengths may be employed by such stations provided they do not exceed 600 meters.

2. Vessels of small tonnage which are unable to have plants on board insuring a wave length of 300 meters may be authorized to use a shorter wave length.



1. The International Bureau shall be charged with List of sta- drawing up a list of wireless telegraph stations of the class referred to in Article 1 of the Convention. list shall contain for each station the following data: (1) Name, nationality, and geographical location in the case of coastal stations; name, nationality, distinguishing signal of the International Code and name of ship's home port in the case of stations on shipboard;


Other data.

(2) Call letters (the calls shall be distinguishable from one another and each must be formed of a group of three letters);

(3) Normal range;

(4) Wireless telegraph system;

(5) Class of receiving apparatus (recording, acoustic, or other apparatus);

(6) Wave lengths used by the station (the normal wave length to be underscored);

(7) Nature of service carried on by the station:
General public correspondence;

Limited public correspondence (correspondence with vessels... correspondence with shipping lines . . .; correspondence with ships fitted with apparatus of the system, etc.);

Long-range public correspondence;
Correspondence of private interest;

Special correspondence (exclusively official correspondence); etc.

(8) Hours during which the station is open;
(9) Coastal rate or shipboard rate.

2. The list shall also contain such data relating to wireless telegraph stations other than those specified in Article 1 of the Convention as may be communicated to the International Bureau by the Management of the Wireless Telegraph Service ("Administration ") which such stations are subject.


signals prohibited.

The exchange of superfluous signals and words is pro- Superfluous hibited to stations of the class referred to in Article 1 of the Convention. Experiments and practice will be permitted in such stations in so far as they do not interfere with the service of other stations.


stations to be

1. No station on shipboard shall be established or Shipboard worked by private enterprise without authority from the licensed. Government to which the vessel is subject. Such authority shall be in the nature of a license issued by said Government.

2. Every station on shipboard that has been so author- Requireized shall comply with the following requirements:

(a) The system employed shall be a syntonized system;

(b) The rate of transmission and reception, under normal conditions, shall not be less than twelve words a minute, words to be counted at the rate of five letters each;

(c) The power transmitted to the wireless telegraph apparatus shall not, under normal conditions, exceed one kilowatt. Power exceeding one kilowatt may be employed when the vessel finds it necessary to correspond while more than 300 kilometers distant from the nearest coastal station, or when, owing to obstructions, communication can be established only by means of an increase of power.

3. The service of the station on shipboard shall be carried on by a telegraph operator holding a certificate issued by the Government to which the vessel is subject. Such certificate shall attest the professional efficiency of the operator as regards:

(a) Adjustment of the apparatus;

(b) Transmission and acoustic reception at the rate of not less than 20 words a minute;

(c) Knowledge of the regulations governing the ex

change of wireless telegraph correspondence:


Operator's certificate.


4. The certificate shall furthermore state that the Gov- Secrecy reernment has bound the operator to secrecy with regard to

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If the management of the wireless telegraph service of Infractions. a country has knowledge of any infraction of the Convention or of the Regulations committed in any of the stations authorized by it, it shall ascertain the facts and fix the responsibility.

In the case of stations on shipboard, if the operator is responsible for such infraction, the management of the


wireless telegraph service shall take the necessary measures and, if the necessity should arise, withdraw the certificate. If it is ascertained that the infraction is the result of the condition of the apparatus or of instructions given the operator, the same method shall be pursued with regard to the license issued to the vessel. Repeated in- 2. In cases of repeated infractions chargeable to the same vessel, if the representations made to the wireless telegraph management of the country to which the vessel is subject by that of another country remain without effect, the latter shall be at liberty, after giving due notice, to authorize its coastal stations not to accept communications proceeding from the vessel at fault. In case Arbitration of disagreement between the managements of the wireless telegraph service of two countries, the question shall be submitted to arbitration at the request of either of the two Governments at issue. The procedure in such case shall be the same as indicated in Article 18 of the Convention.

of disagree


Hours of service of

coastal stations.



Constant service.

Limited service.

of work by limited stations.

1. The service of coastal stations shall, as far as possible, be constant, day and night, without interruption. Certain coastal stations, however, may have a service of limited duration. The management of the wireless telegraph service of each country shall fix the hours of service.

2. The coastal stations whose service is not constant Completion shall not close before having transmitted all their wireless telegrams to the vessels which are within their radius of action, nor before having received from such vessels all the wireless telegrams of which notice has been given. This provision is likewise applicable when vessels signal their presence before the actual cessation of work.

Form and posting of

wireless telegrams.



Messages through noncontracting

If the route of a wireless telegram is partly over telegraph lines, or through wireless telegraph stations subGovernments. ject to a noncontracting Government, such telegram may be transmitted provided the managements of the wireless telegraph service to which such lines or stations are subject have declared that, if the occasion should arise, they will comply with such provisions of the Convention and of the Regulations as are indispensable to the regular transmission of wireless telegrams and that the payment. of charges is insured.



1. Wireless telegrams shall show in the preamble that Notice of the service is "wireless" ("radio").

2. In the transmission of wireless telegrams of shipboard stations to coastal stations, the date and hour of" posting may be omitted in the preamble.



Upon reforwarding a wireless telegram over the tele- ing by coastal graph system, the coastal station shall show thereon its station. own name as the office of origin, followed by that of the vessel, and shall state, as the hour of posting, the hour when the telegram was received by it.


The address of wireless telegrams intended for ships at Messages to sea shall be as complete as possible. It shall embrace the ships at sea. following:

(a) The name of the addressee, with additional designations if any;

(b) The name of the vessel as it appears in the list, supplemented by her nationality and, if necessary, by her distinguishing signal of the International Code, in case there are several vessels of the same name;

(c) The name of the coastal station as it appears in the list.

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The coastal rate shall not exceed 60 centimes (11.6 Maximum. cents) a word, and the shipboard rate shall not exceed 40 centimes (7.7 cents) a word.

A minimum rate per telegram, not to exceed the coastal rate or shipboard rate for a wireless telegram of ten words, may be imposed as coastal or shipboard rate.


The country within whose territory a coastal station is established which serves as intermediary for the exchange of wireless telegrams between a station on board ship and another country shall be considered, so far as the application of telegraph rates is concerned, as the country of origin or of destination of such telegrams, and not as the country of transit.




ary service.


of charges.


The total charge for wireless telegrams shall be collected of the sender.



Transmission of wire

less telegrams.


Stations on shipboard shall to that end have the necessary tariffs. They shall be at liberty, however, to obtain information from coastal stations on the subject of rates for wireless telegrams for which they do not possess all the necessary data.




Morse Inter- The signals to be employed are those of the Morse Innational Code. ternational Code.



Immediate attention, etc.

Call letters.

Use of International Signal Code.

Order of transmission.

Alternate or

in series.


Ships in distress shall use the following signal:

repeated at brief intervals.

As soon as a station perceives the signal of distress it shall cease all correspondence and not resume it until after it has made sure that the correspondence to which the call for assistance has given rise is terminated.

In case the ship in distress adds at the end of the series of her calls the call letters of a particular station the answer to the call shall be incumbent upon that station alone. If the call for assistance does not specify any particular station, every station perceiving such call shall be bound to answer it.


1. The call letters following the letters

"PR B" signify that the vessel or station making the call desires to communicate with the station called by means of the International Signal Code.

The combination of the letters P R B as a service signal for any other purpose than that specified above is prohibited.

2. Wireless telegrams may be framed with the aid of the International Signal Code.

Those addressed to a wireless telegraph station with a view to being forwarded by it are not to be translated by such station.



Between two stations wireless telegrams of the same order shall be transmitted one by one, by the two stations

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