Your sails are your boat’s engine. As any avid sports car driver would tell you, an improperly maintained engine will detract from your car’s performance, and so too will the sails on your race boat.

In this series, we’ve already covered tacks and jibes. Now for a few words on spinnakers. Fortunately, for the most part, the key principles apply to both asymmetrical and symmetrical spinnakers. If ...