Code for Ship Weather Reports
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Jump to code example
Code format
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
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
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