Information

  • The following is for information:

    1. International Code Flags

    2. Maritime Emergency Radio Procedure

    3. Knots to Miles per Hour Conversion Table

    4. The Beaufort Wind Scale

    1. INTERNATIONAL CODE FLAGS

    2. EMERGENCY RADIO PROCEDURES

    The preferred method of contacting the UK Coastguard is by DSC for all

    types of calls (Distress Urgency and Routine)

    NAME OF VESSEL: ………………………………………………………………

    MMSI No: ……………………………………………………………………………..

    CALL SIGN: ………………………………………………………………………….

    • Check main battery switch is on; switch radio on, turn up volume
    • Adjust squelch control until noise disappears

    If you have a DSC radio, do this first:

    • Press DISTRESS button once, select distress designation (if possible)
    • If no automatic GPS interface, follow the menu instructions and enter your current position manually (if you do not know present position leave the last position as displayed)
    • Press DISTRESS button again AND HOLD for 5 seconds until acoustic alarm stops
    • Wait 15 seconds then continue as below;

    Then for both DSC and non-DSC radios:

    • Set the radio channel to 16 high power
    • Press microphone and speak your Distress or Urgency message slowly

    And clearly:

    • MAYDAY, MAYDAY, MAYDAY
    • THIS IS …………………………. (name of vessel 3 times)
    • MAYDAY ………………………. (name of vessel, call sign and MMSI number spoken once)
    • MY POSITION IS ……………. (latitude and longitude, or true bearing FROM a known point) – IF YOU DON’T KNOW, DON’T GUESS – GIVE YOUR LAST KNOWN POSITION
    • I AM ………………………………… (sinking, on fire etc)
    • I REQUIRE IMMEDIATE ASSISTANCE
    • I HAVE …………………….(number of persons on board and any other relevant information such as availability of liferaft)
    • INTENTIONS (eg abandoning to liferaft with hand held radio)
    • OVER – THIS MEANS ‘REPLY TO ME’
    • RELEASE THE TRANSMIT BUTTON
    • KEEP LISTENING ON CHANNEL 16 FOR INSTRUCTIONS

    MAKE SURE THAT YOU AND OTHERS ON BOARD KNOW HOW TO USE YOUR RADIO BEFORE YOU NEED IT IN AN EMERGENCY

    This document was reproduced in 2011 courtesy of the Maritime and Coastguard Agency (MCA)


    3. KNOTS TO MPH CONVERSION TABLE

    KTS to MPH
    5 Knots = 5.8 MPH
    10 Knots = 11.5 MPH
    15 Knots = 17.3 MPH
    20 Knots = 23.0 MPH
    25 Knots = 28.8 MPH
    30 Knots = 34.6 MPH
    35 Knots = 40.3 MPH
    40 Knots = 46.1 MPH
    45 Knots = 51.8 MPH
    50 Knots = 57.6 MPH
    55 Knots = 63.4 MPH
    60 Knots = 69.1 MPH
    65 Knots = 74.9 MPH
    70 Knots = 80.6 MPH
    75 Knots = 86.4 MPH
    80 Knots = 92.2 MPH
    85 Knots = 97.9 MPH
    90 Knots = 103.7 MPH
    95 Knots = 109.4 MPH
    100 Knots = 115.2 MPH
    105 Knots = 121.0 MPH
    110 Knots = 126.7 MPH
    115 Knots = 132.5 MPH
    120 Knots = 138.2 MPH
    125 Knots = 144.0 MPH
    130 Knots = 149.8 MPH
    135 Knots = 155.5 MPH
    140 Knots = 161.3 MPH
    145 Knots = 167.0 MPH
    150 Knots = 172.8 MPH

    4. THE BEAUFORT WIND SCALE

    Windspeed
    in MPH
    Description – Visible Condition
    0 Calm smoke rises vertically
    1 – 4 Light air direction of wind shown by smoke but not by wind vanes
    4 – 7 Light breeze wind felt on face; leaves rustle; ordinary wind vane moved by wind
    8 – 12 Gentle breeze leaves and small twigs in constant motion; wind extends light flag
    13 – 18 Moderate breeze raises dust and loose paper; small branches are moved
    19 – 24 Fresh breeze small trees in leaf begin to sway; crested wavelets form on inland water
    25 – 31 Strong breeze large branches in motion; telephone wires whistle; umbrellas used with difficulty
    32 – 38 Moderate gale whole trees in motion; inconvenience in walking against wind
    39 – 46 Fresh gale breaks twigs off trees; generally impedes progress
    47 – 54 Strong gale slight structural damage occurs; chimney pots and slates removed
    55 – 63 Whole gale trees uprooted; considerable structural damage occurs
    64 – 72 Storm very rarely experienced; accompanied by widespread damage
    73+ Hurricane devastation occurs

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