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UNIT 7 COMMUNICATION

UNIT 7 COMMUNICATION. DISTRESS CALLS. The transmission of distress alert indicates that a ship is in distress and in need of assistance. Distress alerting is the rapid reporting of a distress incident to a unit which can provide assistance. Distress signals are:

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UNIT 7 COMMUNICATION

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  1. UNIT 7COMMUNICATION DISTRESS CALLS

  2. The transmission of distress alert indicates that a ship is in distress and in need of assistance.

  3. Distress alerting is the rapid reporting of a distress incident to a unit which can provide assistance

  4. Distress signals are: • visual signals (e.g. a flare , a flag); • audio signals (e.g. a whistle, rocket) • radio signals (e.g. ‘Mayday’ by radiotelephone).

  5. SMOKE SIGNAL

  6. HAND FLARES

  7. When a distress alert is received by a rescue coordination centre, it will relay the alert to search and rescue (SAR) units and ships near the incident

  8. A distress alert should indicate the identification, position, time and its nature.

  9. Transmission of the Distress Message • Press the distress button to initiate the distress mode. • Select the band on which the alert is to be transmitted. • The radio must be tuned to the DSC distress channel of the chosen band. • If time allows, key in the nature of the distress, the position and the time. • Select type of communication and transmit the distress alert.

  10. Emergency frequencies are: • VHF- Channel 16 • MF - 2182 kHz • HF - 4125 kHz, 6215 kHz, 8291 kHz, 12290 kHz, and 16420 kHz.

  11. Telex emergency frequencies are: • MF - 2174.5 kHz • HF - 4177.5, kHz, 6268 kHz, 8376.5 kHz, 12520 kHz, and 16695 kHz

  12. Message Format • Mayday - Mayday indicates that it is a distress message. Identity - Maritime Mobile Service Identity number repeated three times. • Position • The nature of distress • Required assistance • Over

  13. ANSWER THE QUESTIONS • 1- What does a distress alert indicate?

  14. 2-What are the types of distress signals?

  15. 3- How can you transmit a distress alert on DSC unit?

  16. 5- What does Mayday indicate?

  17. 6-What is said when transmission is finished?

  18. 7-How many times MMSI repeated?

  19. ETYMOLOGY • Mayday < French, m’aider, help me • Telex < teletypewriter + exchange

  20. SOME WORDS • Assistance (n)- Aid, help

  21. Broadcast (v) –To transmit over the radio

  22. Incident (n) - Event

  23. Study the words below and find more examples verbnoun fire fire orbit orbit

  24. Find the synonyms of the given words aid =……………………… begin =……………………… permit =……………………… pick out =……………………… quick =………………………

  25. Underline the odd one. EX. 1-bosun donkeyman oiler wiper

  26. 2-liner crankshaft piston boiler

  27. 3-sextant compass log Aldis lamp

  28. 4-Loran Omega Transit Console

  29. 5-distress signal urgency safety

  30. 6-whistle bell gong flag

  31. 7-NAVTEX DSC GPS INMARSAT

  32. 8-IMO IALA ITU EGC

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