Tacking and gybing angles are important on any boat that you race on. How else are you going to call your layline to the top or bottom marks?

What makes them more difficult for cats vs monos, is that they are more speed dependent. Most mono's have pretty consistent angles because of their speeds relative to wind strength are not as drastic (excluding sport boats).

Most cats have dramatically different tacking and gybing angles based on their wind speeds. I've seen anywhere from 80 to 110 degree tacking angles on the same cat. 80 in flat water fully trapped conditions, and 110 in light air or lumpy conditions.

You crew is just asking what the relative tacking angles are so she can get her head out of the boat focus and on "climbing the ladder" up and down the course.