Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 34°F and the wet bulb thermometer reads 31°F. How would you encode the air temperature groups in the report?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 10011, 2104/
WMO reporting codes for air temperature require dry and wet bulb readings to be converted to tenths of degrees Celsius or properly formatted Fahrenheit equivalents. Standard code tables assign group identifiers 10 and 20 for dry and wet bulb temperatures respectively.
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