Navigation's the process of reading, and controlling the movement of a craft or vehicle from one place to another. It's also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. The word navigate's derived from the Latin "navigare", meaning "to sail". Latitude's usually expressed in degrees (marked with °) ranging from 0° at the Equator to 90° at the North and South poles. A line of position can refer to two different things: a line o… (More on Navigation)