Peter, Google doesn't come up with anything to help me figure out what "jifling" is.
Sorry, I guess my sailing lessons weren't like anyone else's. JIFL is the acronym (pronounced "jiffle") my instructor used to teach us where to trim the sail. It stands for "Just In From Luffing". If your sail is currently flapping, pull it in until it just stops. If it isn't flapping, let it out until it just starts, then pull it back in a bit.
Thanks Peter. My sailing lessons certainly were not like yours as I was pretty much family and self taught. I grew up in a seaside town where fishing was a major industry. Even if your family didn't fish, pretty much every kid learns to swim, row, paddle, sail, bait a trap and how to power drift a 40' plus lobster boat into the dock, all by the age of 10-12 years and usually in that order. Some kids learn to row before learning to swim but I don't recommend it, for obvious reasons.
The theory I'm familiar with but that was not a term I ever learned.
