Some of the most common terms in sailing refer to the basic directions you'll need to know while on the boat itself, as well as some terms referring to the boat's position (or location) while in the water. If you aren't a sailor but rather a passenger, mariners can seem to speak a foreign language at times. Still, knowing some common nautical terms will help make your experience more enjoyable. And if you're a beginning sailor, using these terms accurately is imperative for operating your boat as well as for communicating with your passengers and fellow sailors.