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The start of each UTC second is marked by the start of 300 cycles of a 1000 Hz tone, with certain omissions and identifications. A cesium atomic clock generates the carrier frequencies (accurate to a part in 10 -11) and the UTC seconds pulses (accurate to 50 microseconds). The signal is transmitted continuously on 3330 kHz, 7850 kHz and 14670 kHz, upper single-sideband H3E (AM compatible).
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Its short wave radio station CHU, with transmitters located at 45✡7’47”N 075✤5’22”W is equipped with vertical antennas to give the best possible coverage to the maximum number of Canadian users. For corresponding Daylight Saving Time, add one hour.Ĭanada’s official time is the responsibility of the National Research Council’s Metrology Research Centre, Ottawa, ON. To convert from Coordinated Universal Time to Local Standard Time look opposite UTC under the appropriate column. UTC) is stated at the head of the appropriate column, or against the figures involved. Times are expressed in four figures, the first two denoting the hour and the last two the minutes, the day starting at midnight with 0000 and ending at 2400. When it is necessary to spell out call signs, service abbreviations and words whose spelling might be misinterpreted, the following letter spelling table should be used: is acknowledged.Ĭheck with the originator and send the correct version.Īs a request - Please send each word twice.Īs information - I will send each word twice. I have received all of your last transmission. This conversation is ended and no response is expected.Īfter I have given OVER, repeat all the message back to me exactly as received. My transmission is ended and I expect a response from you. Let me know that you have received and understood this message.Īn error has been made in this transmission. While it is not practical to lay down precise words and phrases for all radiotelephone procedures, the following should be used where applicable. Table 4-3 - Example of a Ship to Shore Radio MessageĪn acknowledgment of receipt of a message shall not be given until the receiving operator is certain that the transmitted information has been received correctly. Items a) and b), taken together, are known as the “preamble.”
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The class of emission to be used for radiotelephony on the frequency 2182 kHz shall be J3E. Where practicable, and having due regard for Vessel Traffic Services and Seaway Control requirements, a listening watch should be maintained on VHF Ch16 (156.8 MHz).Ģ182 kHz and Ch16 (156.8 MHz) shall only be used for distress, urgency and safety communications and for calling purposes. In the interest of safe navigation, and especially during bad weather conditions, masters should ensure that a continuous listening watch is maintained on 2182 kHz. 4.1 Procedures 4.1.1 Radiotelephone Procedures 4.1.1.1 General