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Wednesday, September 22, 2021

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

Anders Holme, CTO, Jacek Maszota, manager of Poland offices, and NAVTOR CEO Tor Svanes. (Photo: NAVTOR)

NAVTOR Opens Poland Office

NAVTOR has opened a new office in Gdansk, Poland, dedicated to accelerating development…

(Image: Orca AI)

NYK Testing AI-powered Collision Avoidance System

Japanese shipping company Nippon Yusen Kabushiki Kaisha (NYK) is testing a navigation…

(Photo: Port of New Orleans)

Port of New Orleans Resumes Containership Operations After Hurricane Ida

Container vessel operations resumed at the Port of New Orleans on Tuesday, nine days…

© Jonathan Dakin / Adobe Stock

US National Towing Safety Advisory Committee Appoints New Members

The U.S. Coast Guard announced 18 individuals have been appointed to serve as members…

(Photo: Suez Canal Authority)

World's Largest Containership Ever Ace Transits the Suez Canal

The world's largest containership, Ever Ace, made its first transit through the Suez…

© Ferrer Photography / Adobe Stock

Changing of the Guard

The Gulf Intracoastal Canal Association’s retiring executive director reflects on…

VisionMaster's Additional Military Layers include a Target Intercept feature which allows the operator to plan and execute intercept manoeuvres between one vessel and another. (Image: Sperry Marine)

Sperry Marine Debuts Additional Military Layers on VisionMaster Radar and ECDIS

Sperry Marine has strengthened its portfolio of military navigation solutions with…

Image courtesy Kongsberg Digital/KIMFT

Kongsberg Digitial Scores South Korea Sim Center Contract Wins

Kongsberg Digital (KDI) won four successive contracts with maritime training centers…

(Image: NOAA)

Electronic Navigational Charts: An Update and Some Issues

In November 2019, the Office of Coast Survey (OCS), part of the National Oceanic…

(Image: Seall / Mackay Marine)

Seall Enters Distribution Partnership with Mackay Marine

Aberdeen, Scotland-based Seall has secured a partnership with global marine electronics…

Robosys’ autonomous navigating test vessel ‘Roborat’ cruising on the Solent verifying Voyager 100’s collision avoidance decisions. (Photo: Robosys)

Robosys Testing Advanced Navigation Systems on the Solent

Robosys’ latest product, Voyager 100, is aimed at commercial and workboat vessels…

Credit: Keppel O&M

Keppel Offshore & Marine Delivers Russia's First LNG Bunkering Vessel

Singapore-based shipbuilder Keppel Offshore & Marine has delivered Dmitry Mendeleev…

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