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 30°F (-1°C) and the wet bulb thermometer reads 28°F (-2°C). How would you encode the air temperature groups in the report?

Correct Answer: Option C — 11011, 2104/

Per WMO/NWS coding procedures for the Voluntary Observing Ship Program, a dry bulb of 30°F (-1°C) and wet bulb of 28°F (-2°C) results in a code of 11011 for air temperature (1 for positive, 10 for 1°C) and 2104/ for the wet bulb depression (2 for positive, 104 for 0.4°C).