Join Date: Jun 2005
Location: New Orleans
Thanked 39 Times in 36 Posts
Rep Power: 11
In practical terms the tricky part is knowing your apparent wind angle without a vane and gauge that give you the angle. Speed is simple now with GPS, and true wind is easy to find old-school if you just shoot into the wind briefly while watching your compass.
If you're trig-challenged like me, but know true wind and speed, and boatspeed, then you can do a qick pencil plot an a chart and just measure the long AW line.