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 78°F and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 10256, 2023/
Converting Fahrenheit to Celsius for VOS reporting: 78°F is 25.6°C and 75°F is 23.9°C. Coded groups per WMO weather reporting instructions require 10256 for the dry bulb (indicating positive 25.6°C) and 2023/ for the wet bulb temperature.
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