The book covers the main set of issues that helps the boatmaster to guide the ship in a safe and advantageous way from the point of departure to the destination. This includes: location (sea hazards, their fences, description of navigation aids, etc.), navigation (determination of the distance traveled, directions to sea, calculation of the ship's path; navigation definitions of the place of the vessel at sea, etc.), hydrometeorology, seaworthy astronomy (measurement and correction of the heights of the luminaries at sea, determination of the geographical coordinates of the place of the vessel, etc.), maritime practice (supply of ships, management of them, PPSS, etc.).