Such an acknowledgement will stop further transmissions of the distress alert.
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Ship stations in receipt of a distress alert should acknowledge it immediately to assist the coast station in responding to the distress alert. The DSC distress alert is transmitted as follows: The receipt of a distress alert is to be pronounced as followed: a. Mayday (1x), call-sign of ship in distress (3x) / this is / own call-sign (3x) / received mayday b. Mayday (3x) / this is / own call-sign (1x) / received mayday / call-sign of ship in distress (1x) 12 DPKP c. Mayday (1x) / this is … (WRC-07) 32.36 32.36 What does the acronym "ECC" indicate in the received message? On receipt of a DSC acknowledgement or after about 15 seconds, transmit the distress call and message on Channel16: MAYDAY, MAYDAY, MAYDAY A string of dots to stop the DSC scanner, Distress priority code, vessel position & time, emission for follow-on communications, DSC frequency. Ships receiving a DSC distress alert from another ship should normally not acknowledge the alert by DSC since acknowledgment of a DSC distress alert by use of DSC is normally made by coast stations only. 7R-20D5: The DSC distress relay alert is transmitted as follows: Acknowledge the receipt of the distress alert by transmitting the following by radiotelephony on the distress traffic frequency in the same band in which the DSC distress relay alert was received: trailer <<57734B8E8045407C87F7064F81C99BC2>]/Prev 211424>> startxref 0 %%EOF 47 0 obj <>stream The ship should then, in addition, inform a coast station or a coast earth station by any practicable means. 0000004254 00000 n Ship stations operating in areas where reliable communications with a coast station are not practicable, that receive a distress alert from a vessel in their vicinity, must either acknowledge by DSC or send a DSC relay to inform the Rescue Coordination Center. 0000020162 00000 n (WRC-07) 32.35 § 22 A ship station in receipt of a shore-to-ship distress alert relay or distress call relay (see No.
Ship stations in receipt of Distress alert should not defer acknowledgement for a short interval, so that receipt may be acknowledged by the coast station. Set watch on the DSC alerting frequency in the band of frequencies the alert was received. A Coast station has the sole obligation to respond. If a DSC distress alert is received on VHF or MF, the normal procedure to follow is: (a) Watch the DSC control unit for reception of a DSC acknowledgement from a Coast Station. Be careful not to activate a DSC acknowledgement or relay.
Ships receiving a distress relay alert from another ship shall follow the same procedure as for acknowledgment of a distress alert, given above. 0000005448 00000 n Acknowledgement by digital selective calling of receipt of a distress alert in the terrestrial services must comply with ITU-R M.541-9 (incorporated by reference, see § 80.7). 0000004939 00000 n 7R-20D1: MF-HF DSC alerts are transmitted using what emission type? 0000004337 00000 n What action should be taken on receipt of a distress alert?
0000001021 00000 n
Ships receiving a distress relay call transmitted by a coast station shall not use DSC to acknowledge the call, but should acknowledge the receipt of the call by radiotelephony on the distress traffic channel in the same band in which the relay call was received, i.e. 0000001893 00000 n 0000000016 00000 n (b) Tune the radio to the frequency and mode indicated in the DSC alert. (2) The call sign or other identification of the station sending the distress alert; Listen for any follow on voice transmission on the appropriate frequency. On receipt of a DSC distress acknowledgment the ship in distress should commence the distress traffic by radiotelephony on the distress traffic frequency (2182 kHz on MF, channel 16 on VHF) as follows: A ship station that receives a distress alert must, as soon as possible, inform the Master or person responsible for the ship of the contents of the distress alert. acknowledge the receipt of the distress alert by transmitting the following by radiotelephony on the distress traffic frequency in the same band in which the DSC distress alert was received, i.e. Ships should delay any acknowledgement in order to give sufficient time for a coast station to acknowledge the call. 7R-20D2:
Only if no other station seems to have received the DSC distress alert, and the transmission of the DSC distress alert continues, the ship should acknowledge the DSC distress alert by use of DSC to terminate the call. 0000002934 00000 n Alerts concerning navigational hazards are second only to safety traffic.
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