Small Boat Navigation. E-book. Formato PDF Lieut. Com   -  Forgotten Books, 2017  - 

Piloting is determining the position of a vessel by observations on known visible charted objects, or by soundings of the depth of the sea. Dead Reckoning, or the method of sailings, is a means of deducing a vessel's position from the direction and distance sailed from a previous known position. This method involves the rules of plane trigonometry.