Abstract
This chapter is designed to discuss the various aspects of ship speed. When dealing with ships, there are three different speeds to consider. They are the theoretical speed produced by the ship's propeller working in an unyielding fluid. The water just ahead of the propeller is considered to be stationary; the speed of ship working in a yielding fluid and it is the speed of the ship over the ground and the propeller is working in a fluid that has a forward speed; the velocity of advance and this is the speed of the ship relative to the water in which the ship is moving, and it includes current effects for and against the forward motion of the ship. This chapter discusses the aforementioned types of speeds alongwith various examples. It also illustrates how these speeds are interconnected together with the apparent slip and the real slip.
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