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[2] Above: a higher deck of the ship. [1] Aft: toward or at the stern. To the purist, this is an adverb (e.g. "he walked aft"), with the adjective being "after" (e.g. "the after mooring cleat"), but that distinction is becoming blurred in some modern usage. [3]: 6 Adrift: floating in the water without propulsion.
9, 10 - Effects of crosswind and tidal current, causing the vessel's track to differ from its heading. A, B - Vessel's track. TVMDC,AW is a mnemonic for converting from true heading, to magnetic and compass headings. TVMDC is a mnemonic initialism for true heading, variation, magnetic heading, deviation, compass heading, add westerly. The most ...
Common geometric terms of location are: Radial (solid and colored lines) and circumferential roads (dashed and gray lines) in Metro Manila's road network. Axial – along the center of a round body, or the axis of rotation of a body; Radial – along a direction pointing along a radius from the center of an object, or perpendicular to a curved ...
The directivity is defined as the ratio of the maximum signal strength S radiated by the antenna to the signal strength S iso radiated by the isotropic antenna = Since the directional antenna radiates most of its power into a small solid angle around the z-axis its maximum signal strength is much larger than the isotropic antenna which spreads ...
The oldest sailing directions, dating back to the middle ages, descended directly from the Greek and Roman periplii: in classical times, in the absence of real nautical charts, navigation was carried out using books that described the coast, not necessarily intended for navigation, but more often consisting of reports of previous voyages, or celebrations of the deeds of leaders or rulers.
Some more expensive heading indicators are "slaved" to a magnetic sensor, called a flux gate.The flux gate continuously senses the Earth's magnetic field, and a servo mechanism constantly corrects the heading indicator. [4]
Sense of direction is the ability to know one's location and perform wayfinding. [1] [2] It is related to cognitive maps, spatial awareness, and spatial cognition. [3]Sense of direction can be impaired by brain damage, such as in the case of topographical disorientation.
Directional statistics (also circular statistics or spherical statistics) is the subdiscipline of statistics that deals with directions (unit vectors in Euclidean space, R n), axes (lines through the origin in R n) or rotations in R n. More generally, directional statistics deals with observations on compact Riemannian manifolds including the ...