Since the existence of wind is the primary reason we can sail, it is prudent to know all we can about it.

Since waves are primarily the result of surface wind action, they can be accurately predicted. Waves have troughs and crests.

There are two variations on the standing rigging set up: Masthead and Fractional. On masthead rigs, the attachment point for the sidestays (shrouds), forestay, and backstay (if they exist) is at the top of the mast.

Raw-water means that the water is straight from outside the boat. It might be seawater – it might be