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The actual course a vessel travels is referred to as the course over the ground. The current of the ocean alters this course whether pushing it away from its desired course or in the same direction. The vessel's speed through the water is referred to as the boatspeed [2] and the current can affect how fast or slow the vessel moves through the ...
In navigation, the heading of a vessel or aircraft is the compass direction in which the craft's bow or nose is pointed. Note that the heading may not necessarily be the direction that the vehicle actually travels, which is known as its course. [a] Any difference between the heading and course is due to the motion of the underlying medium, the ...
In navigation, the course of a watercraft or aircraft is the cardinal direction in which the craft is to be steered. The course is to be distinguished from the heading, which is the direction where the watercraft's bow or the aircraft's nose is pointed. [1][2][3] The path that a vessel follows is called a track or, in the case of aircraft ...
Sailing Directions are written directions that describe the routes to be taken by boats and ships during coastal navigation and port approaches. There are also products known as Sailing Directions, which are books written by various Hydrographic Offices throughout the world. They are known as Pilot Books, because they provide local knowledge of ...
A traffic separation scheme or TSS is a maritime traffic-management route-system ruled by the International Maritime Organization or IMO. It consists of two (outer) lines, two lanes, and a separation zone. The traffic-lanes (or clearways) indicate the general direction of the ships in that lane; ships navigating within a lane all sail in the ...
In navigation, dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix, and incorporating estimates of speed, heading (or direction or course), and elapsed time. The corresponding term in biology, to describe the processes by which animals update their estimates of ...
Navigational instrument. Navigational instruments are instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction, etc. to arrive at the port or point of destination.
Bilge: the underwater part of a ship between the flat of the bottom and the vertical topsides [13] Bottom: the lowest part of the ship's hull. Bow: front of a ship (opposite of "stern") [1] Centerline or centreline: an imaginary, central line drawn from the bow to the stern. [1] Fore or forward: at or toward the front of a ship or further ahead ...