8swTbTbTb
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8 - Indicator figure, wet-bulb group

sw - Sign and type of wet-bulb temperature
Code                Sign                              Type
0                      Positive or zero             Measured
1                      Negative                       Measured
2                      Iced bulb                       Measured
5                      Positive or zero             Computed
6                      Negative                       Computed
7                      Iced bulb                       Computed

TbTbTb - Wet-bulb temperature in degrees and tenths
e.g.
20.7°C is coded 207
0.3°C is coded 003


Note (Supplementary ships and Auxiliary ships only)