Depends
What is your definition of moderate to strong winds? I don't think any prudent sailor would puposely go out in strong winds in a C22 as they're not really made for heavy weather. Keep in mind that the C22 isn't a tiny dinghy sailor that capsizes all the time. This is a full-on cruising boat. People LIVE on this boat. They're not gonna do that if they flip upside down all the time!If he's just out sailing & the winds blowing nicely, unless he is sailing with a spinnaker, there's very little chance of it capsizing. If he does sail with a spinnaker, then he darn well better be an old hat if he's sailing with it in a stiff breeze! Most beginners don't cuz they're pretty hard to handle. Best to learn in little wind how to handle the sucker.Don't worry, Mom, your baby boy is safe as long as he practices safe seamanship. If you're concerned, pay to enroll him in a Coast Guard class or two. He'll only learn more & you'll sleep better!LaDonna