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1 - Indicator figure for temperature group
sn - Sign of temperature
Code Description
0 Temperature positive or zero
1 Temperature negative
TTT - Air temperature in whole degrees and tenths
e.g.
20.7°C is coded 207
0.3°C is coded 003
Note (Auxiliary ships only)

- Because auxiliary ships are not equipped with tested instruments permitting the determination of tenths of degrees of air temperature, a solidus (/) should be coded for the tenths of degrees.