Manobrabilidade do navio: interações e efeitos da manobra

Abstract

Knowing navigate is a duty of every officer in watchon the bridge of a ship. Obviously, as with any activity performed, few officers know how to do it more efficiently than others. This is mainly by prior theoretical knowledge of all aspects circulating the maneuverability of the ship and the incessant practice of maneuvering the vessel. Knowing this, the primary objective of this monograph is to explain the main hazards involved in the routine activities of navigation in the vicinity of the harbor, emphasizing the physical effectsrelated to the environment andthe ship during the maneuver. The subjects begin by explaining how the hydrostatic pressure acting equally in all directions to a certain depth, is converted into dynamic pressure in a water flow. The Bernoulli’sprinciple for the water flowand to the effects of pressure around an obstacle are described. Then, soon after, the main interactions of ships, based on the above knowledge, can be citedgiving as an example the interaction of the ship with other ships inovertaking,of vessel and tugsand ship and banks, especially in narrow channels and pathways maneuver. Continuing, is also explained the known squat effect, its causes and consequences -explaining how to calculate this phenomenon. After this, other important effects that influence the maneuverability of the ship were cited,as the following wake effect,of current, stall, of draught differenceand rough seas -reiterating its dangers and causes. Finally, it is indicated the importance of this monograph to the officers, as well as all relevant information to the effects and interactions that may undergo during ship maneuvers, and yet practical suggestions is indicated to avoid each of the situations mentioned above.