Relative to Boat Speed Direction - Port side Starboard.

Ac75 apparent wind angle. What is apparent wind. The wind is blowing hard on your back say at 20 knots true wind speed. In traditional sailboats this angel is about 30 degrees off the apparent wind angle.

H as part of a simple mechanical wind indicator that has no purpose otherthan indicating the apparent wind direction. That wind you feel on your face is apparent wind. Get on a bike and start pedaling.

I as part of electrical systems including mechanical systems used to connect position or angle sensors eg. What is Apparent Wind. This can make a big difference.

Figures below are showing apparent wind alpha over the course steered beta. Simply enter true wind angle true wind speed and boat speed to get the apparent wind angle and speed. AC75 capable of 5x windspeed - apparent wind angle 115 deg AC50 capable of 4x windspeed - apparent wind angle 143 deg windsurfer and blokart and AC62 capable of 3x windspeed - apparent wind angle 191 deg.

Apparent wind calculator. A cooling fan a bilge pump a wind indicator a line or quadrant connecting a string. So even when going downwind the leading boat can dump on the boat behind.

Pressure in the sails is given by the apparent wind strength tws. Its a one-design section with the mast surface defined by the rule. β displaystyle beta.