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Sunday, March 3, 2024

Navigation

Navigation, derived from the Latin words "navis" (meaning  "ship") and "agere" (meaning "to drive") is the process of accurately determining the position and controlling the movement of a craft or vehicle along a desired course. This is accomplished by finding the navigator's position compared to known locations or patterns.

Early instruments used for determining latitude were the quadrant, (which measured the altitude of the polestar or the noonday sun,) the astrolabe and the sextant. Longitude was originally fixed using chronometers and tables showing yearly positions of celestial bodies. The first mariners to explore the world’s oceans developed standard ways of observing and recording their location, the routes they traveled, wind and water currents, and other useful facts. These records, logs, and journals made it possible find their way home and pass along their observations. Each successful voyage became a part of an expanding collection of reliable maritime information.

Modern navigation systems are part of a tightly coordinated and widely integrated transportation system in which each vessel must be responsible for staying on course, avoiding collisions, minimizing fuel consumption, and keeping on schedule. Modern navigation systems make use of many traditional tools, such as compasses, charts, instruments; but over the past century radio beacons, satellite networks and global positioning systems have been relied upon with increasing frequency to determine a ship’s position.

Ship compasses are usually stabilized by gyroscopes and installed in housing which properly compensates for the vessel’s motion. Charts are another essential navigational tool- position is fixed using charts of known locations in concert with instruments that calculate a vessel’s relative bearing. Dead reckoning is a method which relies on recording the accurate velocity calculated by gyroscopes and computer analysis of the vessel’s acceleration.

Tags: Navigation

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(Photo: U.S. Central Command)

US Says it Struck Missiles, Drone that Posed Threat to Red Sea Ships

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Participating in the traditional Kagami-biraki ceremony, Jeremy Sutton, CEO, Swire Shipping (center, in blue tie); Chris Robertson, Country Manager – Japan, Swire Shipping (rightmost); share a toast together with former Swire employees (blue traditional Happi coats) and the current Japan team. Image courtesy Swire Shipping

Swire Shipping Opens Branch Office in Japan

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© Nightman1965 / Adobe Stock

Vessel Attacked by Missiles Southeast of Yemen's Aden

Two missiles were fired at a vessel in an attack southeast of the Yemeni port city of Aden on Thursd

© Alex Ruhl / Adobe Stock

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EU Launches Naval Mission to Protect Red Sea Shipping

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(Credit: Ulstein)

Kongsberg to Equip Four Offshore Wind CSOVs Being Built by Ulstein Verft

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© BreizhAtao / Adobe Stock

Former Employee Kills Three at European Navigation

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Illustration (Credit: NYK)

NYK and JERA Agree Long-Term Charter for New LNG Carrier

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Source: Michael Mondello

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(Photo: Silver Ships)

New Fireboat Delivered in Naples, Florida

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The new Type 31 Inspiration Class for the UK Royal Navy. Image UK Royal Navy courtesty Anschütz

Successful FAT of WINBS for UK Royal Navy

Anschütz completed the Factory Acceptance Test (FAT) of its Warship Integrated Navigation…

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