Before revision: Calculating apparent velocity and angle Where: = velocity (boat speed over ground, always => 0) = true wind velocity (always => 0) = true pointing angle in degrees (0 = upwind, 180 = downwind) = apparent wind velocity (always => 0) The above formula is derived from the Law of cosines and using .
After revision: Calculating apparent velocity and angle Where: = velocity (boat speed over ground, always ≥ 0) = true wind velocity (always ≥ 0) = true pointing angle in degrees (0 = upwind, 180 = downwind) = apparent wind velocity (always ≥ 0) The above formula is derived from the Law of cosines and using .