Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. One-half of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 340° relative at 14 knots. You are on course 307°T at 12.6 knots. How should you encode group Nddff?

Question

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. One-half of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 340&deg; relative at 14 knots. You are on course 307&deg;T at 12.6 knots. How should you encode group Nddff?

Accepted Answer

Option D: 42205. Cloud cover amount 'N' (5 oktas) combined with apparent wind converted to true wind direction and speed via vector resolution yields the standard WMO 5-digit group Nddff where cloud oktas, true wind direction tens, and speed are encoded.