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Distress Signal and Distress Traffic/Urgency Transmission

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Introduction Distress alerting Ship to shore The Global Maritime Distress and Safety System (GMDSS) as described in SOLAS Chapter IV defines the first functional ... – PowerPoint PPT presentation

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Title: Distress Signal and Distress Traffic/Urgency Transmission


1
Distress Signal and Distress Traffic/Urgency
Transmission
2
Introduction
  • Distress alerting Ship to shore
  • The Global Maritime Distress and Safety System
    (GMDSS) as described in SOLAS Chapter IV defines
    the first functional requirement as
  • "Every ship, while at sea, shall be capable
  • of transmitting ship-to-shore distress alerts
  • by at least two independent means, each
  • using a different radiocommunication
  • service".
  • three methods of transmitting a distress alert
  • EPIRB
  • Digital Selective Calling (DSC)
  • INMARSAT

3
General Regulations
  • Distress calling procedures are compulsory for
    the maritime mobile service and for
    correspondence between ships, aircraft and
    survival crafts.
  • No regulations shall prevent a coast station from
    using any available means to give assistance to a
    distress station.
  • Distress signals/messages must only be
    transmitted on the direct orders of the master or
    the officer-in-charge.

4
Distress, Urgency and Safety frequencies
  • VHF
  • 156.8 Mhz (Channel 16)
  • MF
  • 2182 Khz
  • HF
  • 4125 Khz
  • 6215 Khz
  • 8291 Khz
  • 12290 Khz
  • 16420 Khz

Two most commonly used VHF Ch. 16 and MF 2182 Khz
5
  • In distress situation, speech and radiotelephony
    must be as SLOW and CLEAR as possible.

Click to play video
6
The international distress and calling frequency
  • 2182 Khz used by ship stations, aeromobile
    stations, and survival craft stations.
  • Coast stations open for public correspondence on
    MF telephony, shall keep listening watch on 2182
    Khz.
  • Ship stations when not engaged in traffic,
    maintain listening watch on 2182 Khz.

7
Silence Periods
  • It is of vital importance that all ships make
    every attempts to listen to the international
    frequency during the silence periods.
  • The first 3 minutes of every hour and half hour.
    (eg. 1300H to 1303H 2230H to 2233H)
  • All transmissions on 2182 Khz must cease.

8
The Radiotelephony alarm signal
  • Two substantially sinusoidal audio frequency
    tones transmitted alternately.
  • One tone at 2200Hz and the other at 1300Hz with a
    duration of 250 milliseconds each.
  • Shall be transmitted as continuously as possible
    of at least 30 seconds, but not exceeding 1 min.

9
Distress
  • A Distress situation is one in which a vessel,
    aircraft, vehicle, or person is
  • threatened by grave and imminent danger
  • and requires immediate assistance.
  • Examples of "grave and imminent danger fire,
    explosion, sinking or abandonship, piracy,
    collision, listing, taking in water.

10
Distress signal
  • Mayday
  • voice procedure radio communication
  • derived from the French venez m'aider
  • Come help me

11
Distress Call
  • MAYDAY, MAYDAY, MAYDAY,
  • This is
  • STOLT EGRET, STOLT EGRET, STOLT EGRET, CALLSIGN
    LAPO4
  • MMSI 25701000

12
Distress Message
  • MAYDAY
  • STOLT EGRET CALLSIGN LAPO4 MMSI 25701000
  • IN POSITION 09.15 SOUTH 102.10 WEST
  • 20 degrees listing to port side
  • Danger of capsizing
  • Need immediate assistance
  • 15 crewmembers
  • The weather is Northwesterly winds,
  • Gale 8 with rainshowers and
  • visibility about 5 nm.

13
Distress Message
  • MAYDAY, MAYDAY, MAYDAY,
  • This is
  • STOLT EGRET, STOLT EGRET, STOLT EGRET,
  • CALLSIGN LAPO4, MMSI 25701000.
  • (brief pause)
  • MAYDAY
  • STOLT EGRET CALLSIGN LAPO4 MMSI 25701000
  • IN POSITION 09.15 SOUTH 102.10 WEST
  • 20 degrees listing to port side
  • Danger of capsizing
  • Need immediate assistance
  • 15 crewmembers
  • The weather is Northwesterly winds, Gale 8 with
    rainshowers and visibility about 5 nm.
  • Over

14
Distress Message Acknowledgement
  • MAYDAY
  • STOLT EGRET, STOLT EGRET, STOLT EGRET, CALLSIGN
    LAPO4, MMSI 25701000
  • This is
  • BERGE MASTER, BERGE MASTER, BERGE MASTER,
    CALLSIGN LANO2
  • RECEIVED MAYDAY

15
  • Any mobile station acknowledging receipt of a
    distress message shall, on the order of the
    MASTER or PERSON Responsible for the ship,
    aircraft, or other vehicle, transmit the
    following information as soon as possible
  • Its name
  • Its position
  • The ETA and Speed towards the station in distress

16
Distress Communication between Stolt Egret and
Berge Master
Click video to play
17
Seelonce Mayday or Seelonce Distress
  • means that the channel may only be used by the
    vessel in distress and the coastguard (and any
    other vessels they ask for assistance in handling
    the emergency). The channel may not be used for
    normal working traffic until 'seelonce feenee' is
    broadcasted.

18
Eg.
  • MAYDAY
  • ALL STATIONS, ALL STATIONS, ALL STATIONS
  • This is
  • BERGE MASTER, BERGE MASTER, BERGE MASTER,
    CALLSIGN LANO2
  • SEELONCE MAYDAY

19
Seelonce Feenee
  • means that the emergency situation has been
    concluded and the channel may now be used
    normally. The word prudonce (prudence caution)
    can also be used to allow restricted working to
    resume on that channel.

20
Eg.
  • MAYDAY
  • ALL STATIONS, ALL STATIONS, ALL STATIONS
  • This is
  • BERGE MASTER, BERGE MASTER, BERGE MASTER,
    CALLSIGN LANO2
  • VESSEL IN DISTRESS MV BRUNITA at 2100H UTC
  • SEELONCE FEENEE

21
Mayday Relay
  • When the station in distress is not itself in a
    position to transmit the distress message
  • When the Master or the person responsible for the
    craft considers that further help is necessary
  • When an unacknowledged distress message is heard
    and one is not in a position to render assistance.

22
Distress Relay Message
  • MAYDAY RELAY, MAYDAY RELAY, MAYDAY RELAY
  • ALL STATIONS, ALL STATIONS, ALL STATIONS
  • This is
  • BERGE MASTER, BERGE MASTER, BERGE MASTER,
    CALLSIGN LANO2 MMSI 257555000
  • FOLLOWING RECEIVED FROM STOLT EGRET CALLSIGN
    LAPO2 MMSI 257333000, ON VHF CH. 16, TIME 1615
    UTC
  • MAYDAY
  • STOLT EGRET CALLSIGN LAPO4 MMSI 25701000
  • IN POSITION 09.15 SOUTH 102.10 WEST
  • 20 degrees listing to port side. Danger of
    capsizing
  • Need immediate assistance
  • 15 crewmembers
  • The weather is Northwesterly winds, Gale 8 with
    rainshowers and visibility about 5 nm.

23
USCG Rescues Northern Belle
24
Exercise
  • Create a distress message
  • Vessel Name MV Cap/Callsign DUX2
  • You are sinking and abandoning ship
  • Your position 8 44 N 124 55 E
  • 12 Persons on board
  • Lt 0500H

25
Assignment
  • Create a safety Message
  • Your Vessels Name is MV Cap/Callsign DUX2
  • You encountered 10 floating containers in
    position 8 45 N 124 34 E Lt 0500H
  • Tell all stations to keep a sharp look out
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