Sailing

Apparent wind

The wind you feel on deck, from the true wind and your own motion.

Inputs

True wind speed (kn)

True wind from (°T)

Heading (°T)

Boat speed (kn)

Result

Apparent wind speed—

Apparent wind angle—

True wind angle—

Angles are measured from the bow; "port" or "starboard" shows which side the wind comes over. Use boat speed through the water for sailing; use speed over ground if you want the wind relative to the seabed.