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?

Question

Accepted Answer

Option A: 10011, 2104/. WMO FM 13 SHIP code mandates air and wet-bulb temperatures be converted to tenths of a degree Celsius. A dry bulb of 34°F (1.1°C) and wet bulb of 31°F (-0.6°C) convert to groups 10011 (positive 1.1°C) and 2104/ (negative 0.6°C).