When you heave-to; ease the main out until it just begins to luff. You don't want it flogging; but you also don't want it to produce any drive. With the main luffing your forward speed will drop down and you will stay in the "calm zone" better.
Also; if you need to reduce sail you can reef down the main while you are hove-to. But you will need a cheek block at the end of the boom and a cleat near the gooseneck so the reefing line through the clew can be tensioned while the mainsheet is eased. You want the reefing line to be pulling both downward and aft so the foot of the reef also gets adequate tension to help flatten the sail. Set up your padeye and cheek block so the reef line makes a 30-45deg angle with the boom centerline when it is tensioned.
I would not heave-to in anything more than 8' swell in a Catalina 22. Waves that are taller and/or breaking could capsize or roll you.
Last edited by KeelHaulin; 06-29-2010 at 01:12 AM.