The biggest use for me of knowing the "tacking angle" is when I race in a Pt-to-Pt race ("distance") and am using a compass. This knowledge allows me to quickly calculate which tack (port or starb) is the "favored" tack. Also it is useful to determine if you have a "tide set" effecting your progress

I find that I my tacking angles are between 90*-100* aproximently .... sometimes 110* if I was pounding through some serious wave conditions ... or against a tide. On "flat" water in a steady medium breeze I would sometimes approach 75*-80* ....

But usually I have found you need to be working w/ a compass in order to make use of "tacking angle" knowledge ... and on a catamaran on a short "buoy" type course you don't have the time ... or a compass. (I'm a POOR traditionalist ... no fancy computerized "aids"... no "apps" ... just a hand bearing compass, a stop watch, my eyes ... and my brain/mind for calculations)

Harry Murphey
H18Mag/P19MX