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 54°F and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report?

Correct Answer: Option C — 10122, 2008/

WMO VOS specifications require Fahrenheit temperatures converted to Celsius. A dry bulb of 54°F equals 12.2°C, encoded as 10122. A wet bulb of 50°F equals 10.0°C, encoded as 2008/ representing the respective dew point or wet bulb depression.