In navigation

Navigation

Navigation is the process of monitoring and controlling the movement of a craft or vehicle from one place to another. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks...

 set and drift are characteristics of the current or the velocity of water over the ground in which a ship is sailing.

Drift is the magnitude, or speed of the current (typically measured in knots) and set is the bearing in the direction the current is flowing. Bearing is measured in degrees clockwise from either magnetic or true (geographical) North.