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    Code for Ship Weather Reports

    Click on the code to jump to the corresponding meaning
    Jump to code example
    Code format
    BBXX CALLSIGN Y Y G G iw 9 9 La La La Qc Lo Lo Lo Lo 4 ix h V V N d d f f 1 sn T T T 2 sn Td Td Td 4 P P P P 5 a p p p 7 w w W1 W2 8 Nh CL CM CH 2 2 2 Ds Vs 0 ss Tw Tw Tw 2 Pw Pw Hw Hw 3 dw1 dw1 dw2 dw2 4 Pw1 Pw1 Hw1 Hw1 5 Pw2 Pw2 Hw2 Hw2 6 Is Es Es Rs 8 s Tb Tb Tb ICE ci Si bi Di zi

    Code format
    Meanings
    BBXX
    Identifier of a ship weather report
    CALLSIGN
    Call sign of the VOS
    Y Y G G iw
    Y Y
    Day of month (UTC)
    G G
    Time of observation to nearest hour (UTC)
    iw
    Wind speed indicator
    9 9 La La La
    9 9
    Position group
    La La La
    Latitude, degrees and tenths
    Qc Lo Lo Lo Lo
    Qc
    Quadrant of the globe
    Lo Lo Lo Lo
    Longitude, degrees and tenths
    4 ix h V V
    4
    Indicator for omission of precipitation group
    ix
    Indicator for weather group
    h
    Height of base of the lowest cloud
    V V
    Horizontal visibility
    N d d f f
    N
    Total cloud amount
    d d
    Direction of surface winds (true direction, in tens of degrees)
    f f
    Speed of surface winds
    1 sn T T T
    1
    Air temperature group
    sn
    Sign of temperature (0 for 0°C or above, 1 for below 0°C)
    T T T
    Air temperature in whole degrees or and tenths
    2 sn Td Td Td
    2
    Dew point temperature group
    sn
    Sign of temperature (0 for 0°C or above, 1 for below 0°C)
    Td Td Td
    Temperature of dew-point in whole degrees or and tenths
    4 P P P P
    4
    Sea level pressure group
    P P P P
    Mean sea level pressure in hectopascal and tenths, thousands digit omitted
    5 a p p p
    5
    3-hour pressure tendency group
    a
    Characteristic changes in atmospheric pressure in last 3 hours
    p p p
    Change of pressure in tenths of hectopascal during last 3 hours
    7 w w W1 W2
    7
    Weather group
    w w
    Present weather
    W1 W2
    Past weather during the preceding 6 hours
    8 Nh CL CM CH
    8
    Cloud group
    Nh
    Total amount of low clouds (or medium clouds, if no low clouds)
    CL
    Type of low clouds: Cu, Cb, Sc, St
    CM
    Type of medium clouds: Ac, As, Ns
    CH
    Type of high clouds: Ci, Cs, Cc
    2 2 2 Ds Vs
    2 2 2
    Maritime data section
    Ds
    Ship's course made good during the past 3 hours
    Vs
    Ship's average speed during the past 3 hours
    0 ss Tw Tw Tw
    0
    Sea surface temperature group
    ss
    Sign and type of measurement of sea surface temperature
    Tw Tw Tw
    Sea surface temperature in whole degrees and tenths
    2 Pw Pw Hw Hw
    2
    Wind wave group
    Pw Pw
    Period of wind waves in seconds
    Hw Hw
    Height of wind waves in units of half metre
    3 dw1 dw1 dw2 dw2
    3
    Swell direction group
    dw1 dw1
    Direction in tens of degree from which the predominant swell is coming
    dw2 dw2
    Direction in tens of degree from which the secondary swell is coming
    4 Pw1 Pw1 Hw1 Hw1
    4
    Primary swell period and height group
    Pw1 Pw1
    Period of the predominant swell in seconds
    Hw1 Hw1
    Height of the predominant swell in units of half metre
    5 Pw2 Pw2 Hw2 Hw2
    5
    Secondary swell period and height group
    Pw2 Pw2
    Period of the secondary swell in seconds
    Hw2 Hw2
    Height of the secondary swell in units of half metre
    6 Is Es Es Rs
    6
    Ice accretion group
    Is
    Type of ice accretion
    Es Es
    Thickness of ice in cm
    Rs
    Rate of ice accretion
    8 sw Tb Tb Tb
    8
    Wet bulb temperature group
    sw
    Sign and type of wet bulb temperature
    Tb Tb Tb
    Wet bulb temperature in whole degrees and tenths
    ICE
    Sea Ice group
    ci Si bi Di zi
    ci
    Concentration or arrangement of sea ice
    Si
    State of development
    bi
    Ice of land origin
    Di
    Bearing of principal ice edge
    zi
    Ice situation and trend over preceding 3 hours

    Jump to code format
    Example
    BBXX VRUY5 23013 99219 11148 41692 80506 10190 20188 40198 51018 74554 8/000 22253 00180 21001 307// 41002 8//// ICE 0////

    Example code
    Meanings
    BBXX
    Ship weather observation
    VRUY5
    Ship call sign VRUV5
    23013
    23
    23rd day of the month
    01
    01 UTC
    3
    Wind speed estimated in knots
    99219
    99
    Position group
    219
    Latitude 21.9°
    11148
    1
    Northern latitude & Eastern longitude
    1148
    Longitude 114.8°
    41692
    4
    Precipitation group is omitted
    1
    Weather group (7 w w W1 W2) is included
    6
    Cloud base height 1000 - 1500 metres
    92
    Visibility 200 - 500 metres
    80506
    8
    Total cloud cover 8 oktas
    05
    Wind direction 45° - 54°
    06
    Wind speed 06 knots
    10190
    1
    Air temperature group
    0
    Zero or positive
    190
    19.0°C
    20188
    2
    Dew point temperature group
    0
    Zero or positive
    188
    18.8°C
    40198
    4
    Sea level pressure group
    0198
    1019.8 hPa
    51018
    5
    3-hour pressure tendency group
    1
    increasing then steady
    018
    pressure change 1.8 hPa
    74554
    7
    Weather group
    45
    Present weather, fog and sky invisible
    54
    Past weather, drizzle (5) and fog (4)
    8/000
    8
    Cloud group
    /
    Cloud invisible
    000
    No low, medium and high cloud information
    22253
    222
    Maritime data section
    5
    Ship's course direction SW
    3
    Ship's average speed 11-15 knots
    00180
    0
    Sea surface temperature group
    0
    Zero or positive, intake measurement
    180
    18.0°C
    21001
    2
    Wind wave group
    10
    Wave period 10 seconds
    01
    Wave height 0.5 metre
    307//
    3
    Swell direction group
    07
    Primary swell direction 65° - 74°
    //
    No secondary swell direction
    41002
    4
    Primary swell period and height group
    10
    Primary swell period 10 seconds
    02
    Primary swell height 1.0 metre
    -
    (skipped when there is no secondary swell period and height data)
    -
    (skipped when there is no ice accretion)
    8////
    8
    Wet bulb temperature group
    ////
    No related wet bulb temperature data
    ICE
    Sea ice group
    0////
    0
    No sea ice
    ////
    No related ice information
    Click on the code to jump to the corresponding meaning
    Code format
    Example
    BBXX CALLSIGN Y Y G G iw 9 9 La La La Qc Lo Lo Lo Lo 4 ix h V V N d d f f 1 sn T T T 2 sn Td Td Td 4 P P P P 5 a p p p 7 w w W1 W2 8 Nh CL CM CH 2 2 2 Ds Vs 0 ss Tw Tw Tw 2 Pw Pw Hw Hw 3 dw1 dw1 dw2 dw2 4 Pw1 Pw1 Hw1 Hw1 5 Pw2 Pw2 Hw2 Hw2 6 Is Es Es Rs 8 sw Tb Tb Tb ICE ci Si bi Di zi
    BBXX VRUY5 23013 99219 11148 41692 80506 10190 20188 40198 51018 74554 8/000 22253 00180 21001 307// 41002 8//// ICE 0////

    Code format
    Meanings
    Example code
    Meanings
    BBXX
    Identifier of a ship weather report
    BBXX
    Ship weather observation
    CALLSIGN
    Call sign of the VOS
    VRUY5
    Ship call sign VRUV5
    Y Y G G iw
    Y Y
    Day of month (UTC)
    G G
    Time of observation to nearest hour (UTC)
    iw
    Wind speed indicator
    23013
    23
    23rd day of the month
    01
    01 UTC
    3
    Wind speed estimated in knots
    9 9 La La La
    9 9
    Position group
    La La La
    Latitude, degrees and tenths
    99219
    99
    Position group
    219
    Latitude 21.9°
    Qc Lo Lo Lo Lo
    Qc
    Quadrant of the globe
    Lo Lo Lo Lo
    Longitude, degrees and tenths
    11148
    1
    Northern latitude & Eastern longitude
    1148
    Longitude 114.8°
    4 ix h V V
    4
    Indicator for omission of precipitation group
    ix
    Indicator for weather group
    h
    Height of base of the lowest cloud
    V V
    Horizontal visibility
    41692
    4
    Precipitation group is omitted
    1
    Weather group (7 w w W1 W2) is included
    6
    Cloud base height 1000 - 1500 metres
    92
    Visibility 200 - 500 metres
    N d d f f
    N
    Total cloud amount
    d d
    Direction of surface winds (true direction, in tens of degrees)
    f f
    Speed of surface winds
    80506
    8
    Total cloud cover 8 oktas
    05
    Wind direction 45° - 54°
    06
    Wind speed 06 knots
    1 sn T T T
    1
    Air temperature group
    sn
    Sign of temperature (0 for 0°C or above, 1 for below 0°C)
    T T T
    Air temperature in whole degrees or and tenths
    10190
    1
    Air temperature group
    0
    Zero or positive
    190
    19.0°C
    2 sn Td Td Td
    2
    Dew point temperature group
    sn
    Sign of temperature (0 for 0°C or above, 1 for below 0°C)
    Td Td Td
    Temperature of dew-point in whole degrees or and tenths
    20188
    2
    Dew point temperature group
    0
    Zero or positive
    188
    18.8°C
    4 P P P P
    4
    Sea level pressure group
    P P P P
    Mean sea level pressure in hectopascal and tenths, thousands digit omitted
    40198
    4
    Sea level pressure group
    0198
    1019.8 hPa
    5 a p p p
    5
    3-hour pressure tendency group
    a
    Characteristic changes in atmospheric pressure in last 3 hours
    p p p
    Change of pressure in tenths of hectopascal during last 3 hours
    51018
    5
    3-hour pressure tendency group
    1
    increasing then steady
    018
    pressure change 1.8 hPa
    7 w w W1 W2
    7
    Weather group
    w w
    Present weather
    W1 W2
    Past weather during the preceding 6 hours
    74554
    7
    Weather group
    45
    Present weather, fog and sky invisible
    54
    Past weather, drizzle (5) and fog (4)
    8 Nh CL CM CH
    8
    Cloud group
    Nh
    Total amount of low clouds (or medium clouds, if no low clouds)
    CL
    Type of low clouds: Cu, Cb, Sc, St
    CM
    Type of medium clouds: Ac, As, Ns
    CH
    Type of high clouds: Ci, Cs, Cc
    8/000
    8
    Cloud group
    /
    Cloud invisible
    000
    No low, medium and high cloud information
    2 2 2 Ds Vs
    2 2 2
    Maritime data section
    Ds
    Ship's course made good during the past 3 hours
    Vs
    Ship's average speed during the past 3 hours
    22253
    222
    Maritime data section
    5
    Ship's course direction SW
    3
    Ship's average speed 11-15 knots
    0 ss Tw Tw Tw
    0
    Sea surface temperature group
    ss
    Sign and type of measurement of sea surface temperature
    Tw Tw Tw
    Sea surface temperature in whole degrees and tenths
    00180
    0
    Sea surface temperature group
    0
    Zero or positive, intake measurement
    180
    18.0°C
    2 Pw Pw Hw Hw
    2
    Wind wave group
    Pw Pw
    Period of wind waves in seconds
    Hw Hw
    Height of wind waves in units of half metre
    21001
    2
    Wind wave group
    10
    Wave period 10 seconds
    01
    Wave height 0.5 metre
    3 dw1 dw1 dw2 dw2
    3
    Swell direction group
    dw1 dw1
    Direction in tens of degree from which the predominant swell is coming
    dw2 dw2
    Direction in tens of degree from which the secondary swell is coming
    307//
    3
    Swell direction group
    07
    Primary swell direction 65° - 74°
    //
    No secondary swell direction
    4 Pw1 Pw1 Hw1 Hw1
    4
    Primary swell period and height group
    Pw1 Pw1
    Period of the predominant swell in seconds
    Hw1 Hw1
    Height of the predominant swell in units of half metre
    41002
    4
    Primary swell period and height group
    10
    Primary swell period 10 seconds
    02
    Primary swell height 1.0 metre
    5 Pw2 Pw2 Hw2 Hw2
    5
    Secondary swell period and height group
    Pw2 Pw2
    Period of the secondary swell in seconds
    Hw2 Hw2
    Height of the secondary swell in units of half metre
    -
    (skipped when there is no secondary swell period and height data)
    6 Is Es Es Rs
    6
    Ice accretion group
    Is
    Type of ice accretion
    Es Es
    Thickness of ice in cm
    Rs
    Rate of ice accretion
    -
    (skipped when there is no ice accretion)
    8 sw Tb Tb Tb
    8
    Wet bulb temperature group
    sw
    Sign and type of wet bulb temperature
    Tb Tb Tb
    Wet bulb temperature in whole degrees and tenths
    8////
    8
    Wet bulb temperature group
    ////
    No related wet bulb temperature data
    ICE
    Sea ice group
    ICE
    Sea ice group
    ci Si bi Di zi
    ci
    Concentration or arrangement of sea ice
    Si
    State of development
    bi
    Ice of land origin
    Di
    Bearing of principal ice edge
    zi
    Ice situation and trend over preceding 3 hours
    0////
    0
    No sea ice
    ////
    No related ice information
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