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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 of a location (opposite of "aft") [1] Preposition form is "before", e.g. "the mainmast is before the mizzenmast". Inboard: attached inside the ...
Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...
Direction determination refers to the ways in which a cardinal direction or compass point can be determined in navigation and wayfinding.The most direct method is using a compass (magnetic compass or gyrocompass), but indirect methods exist, based on the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.
An internal directional relation specifies where an object is located inside the reference object while an external relations specifies where the object is located outside of the reference objects. Examples for internal directional relations: left; on the back; athwart, abaft
True course is 120°, the Variation is 5° West, and the Deviation is 1° West. T: 120° V: +5° M: 125° D: +1° C: 126° Therefore, to achieve a true course of 120°, one should follow a compass heading of 126°. True course is 120°, the Variation is 5° East and the Deviation is 1° East. T: 120° V: −5° M: 115° D: −1° C: 114°
The bearing angle value will always be less than 90 degrees. [1] For example, if Point B is located exactly southeast of Point A, the bearing from Point A to Point B is "S 45° E". [3] For example, if the bearing between Point A and Point B is S 45° E, the azimuth between Point A and Point B is 135°. [1] [3] Azimuths and bearings.
The terms measurement while drilling (MWD), and logging while drilling (LWD) are not used consistently throughout the industry. Although these terms are related, within the context of this section, the term measurement while drilling refers to directional-drilling measurements, e.g. for decision support for the wellbore path, (Inclination and ...
A Prussian milestone c. 1836, reading "II MEILEN BIS BERLIN" ("two miles to Berlin").. The first direction signs were milestones on the Roman road network; finding one's location on the long, straight roads was difficult, and hence, large stones were placed at intervals along the roads, giving the distance in Roman miles to nearby major cities, and usually to the capitals of major provinces.