An alternative to the Tack
Bob, I agree with the others that momentum and sail set are the key. We have a lake here (Lake Winnipeg)that is almost the size of Lake Erie, but it is shallow---around 20-40 feet in the south end. We get some high wind, the waves are very close together to a height of maybe 6-8 feet in a storm. By the time you climb one wave you loose boat speed and even withe speed gained coming down the back, the next wave can be so close that the wave will prevent a tack. It simply throws you back to your old course. Our answer-- the jibe. We haul in the main as close as possible and then go through the wind and then let out the main again and get to the new course. While your question was on tacking, in difficult conditions the jibe works.