E

Ease
To slacken or relieve tension on a line.

Ebb Tide
A receding tide.

EPIRB
Emergency Position Indicating Radio Beacon. An emergency device that uses a radio signal to alert satellites or passing airplanes to a vessel's position.

Equator
An imaginary line around the center of the world at Latitude 0°.

Even Keel
When a boat is floating on its designed waterline, it is said to be floating on an even keel.

Eye of the wind
The direction from which the wind is blowing.