The Leeway Table

WHAT IS THE ANSWER TO MR. KIMBALL'S QUESTION?

Past 180° the wind is coming from the other side of the boat. The TWA is give in degrees off the bow, so there is no reason for it to go beyond 180°. If you insist on knowing the value for 200°, it'll be the value of 160°.

UPDATED, I think I glossed over the difference between TWD and TWA. I thin I need to determine the TWA based on the heading. I'm still confused regarding the Leeway Table. As an example, In the answer table for problem 3-1, the TWD is 270 and the leeway angle is listed as 8 degrees. if measured off the bow in direction of the water track is is not right either. Any thoughts welcome.

I too am confused about this. Has anyone gotten a clear answer?

I typed out a detailed explanation but apparently there is a character limit. I'll make this shorter. True Wind Direction (TWD) is what a weather forecast would give you. In the problems, it is given as a compass bearing. True Wind Angle (TWA) is the angle of the wind off of the bow of a sailboat. It is always relative to the direction the boat is pointing. So of course leeway changes by our point of sail, so we have the table to work with to understand the leeway for our particular boat at a particular wind speed and TWA. The table goes from close hauled, to beam reach, to board reach and finally running. Notice leeway is the most pronounced when close hauled and not present at all while running.

More on 3-1 specifically: After plotting our current position, where we'd like to go, and accounting for set and drift, we can see that we are basically going to be steering 178 degrees true without accounting for leeway. We know that the wind is out of 270 degrees at 10 knots. So let's imagine ourselves on the boat. That's starboard tack beam reach. But let's do the math: 270 degrees - 178 degrees leaves us with 92 degrees. Let's round to 90 and look at the table. 8 degrees of leeway. We know we need to steer closer to the wind to compensate for leeway, so we know to add 8 degrees to 178 giving us 186 degrees as our heading.

THANK YOU DAVID KOENIG, I finally understand this chart and how to apply it to the exercises. Grant you should incorporate his response in the course. Also it looks like NauticEd does not respond to this SeaTalk, why not? Do you check out the questions?