Video answer: How to work out compass bearings
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A binnacle is a waist-high case or stand on the deck of a ship, generally mounted in front of the helmsman, in which navigational instruments are placed for easy and quick reference as well as to protect the delicate instruments.
Video answer: Simplifying a marine's compass
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A marine compass is oriented so the N-S line of the compass runs through the pivot point on the compass dial and an index mark on the compass’s base. This is called a "lubber’s line." This line needs to be aligned along the centerline of the craft: bow/north; stern/south.
A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.Other methods may be used, including gyroscopes, magnetometers, and GPS receivers. Compasses often show angles in degrees: north ...
Marine compasses are usually liquid-filled. The liquid has a damping (reducing) effect on disturbances caused by the motion of the vessel in rough seas. The compass card is mounted above the magnetic needle mechanism. It is finely balanced on a needle point, floating and able to swing around to align with magnetic north. The reading is taken from the fixed lubber line on the body of the compass.
What is a Compass? A compass is a tool used for navigation, direction, and location. On a basic compass, you’ll find a compass needle in the middle of a diagram called the compass rose with the four main directions — north, east, south, and west.
A marine compass will have one set of magnets that is balanced to seek out magnetic north. Magnetic north is not true north — as in the North Pole — but the location of Earth's north polarization, near Greenland. The compass rose on nautical charts shows the difference, called variation, between true north and magnetic north for navigation.
Marine Compasses. Marine Compasses Subcategories. Spare Parts; Refine Results. Brand. Plastimo. Show More. Price. $100 or below $100 to $200 $ ... The unique network address of your computer is called its "IP address," and is sent automatically each time you access any Internet site. From a computer's IP address, it is possible to determine the ...
By the 15th century, explorers realized that the “north” indicated by a compass was not the same as Earth’s true geographic north. This discrepancy between magnetic north and true north is called variation (by mariners or pilots) or magnetic declination (by land navigators) and varies depending on location. Variation is not significant when using magnetic compasses near the Equator, but ...
Compasses need to be “swung” to determine the amount of deviation, and corrector magnets, which lie below the compass, can be adjusted by hand to eliminate deviation. However, compass correcting is complicated, and generally requires an expert (a so-called compass adjuster) to do it correctly.
Calibration. A compass in good working condition is very accurate, but it needs to be checked periodically on a known line of direction. This process, called compass calibration, is described in the table below. Tolerance is +/- 3° Step Action 1 Note the calibration point azimuth: the known magnetic azimuth from the
SOME compasses use alcohol, others use mineral oil, still others use "compass fluid" which is similar to but not the same as mineral oil. Using the wrong fluid can change the damping AND dissolve the printing on the card, or cause the seals to leak again.