Marine Link
Tuesday, August 14, 2018

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

Image: Samsung Heavy Industries

Samsung Heavy Industries Builds Smart Ship On AWS Platform

Amazon Web Services (AWS), an Amazon.com company, announced that Samsung Heavy Industries…

Image: Port of Antwerp

Antwerp Port Fire Creates Toxic Cloud

Toxic smoke from a massive smoldering fire has triggered an evacuation in the Port of Antwerp…

Photo: ChartCo

ChartCo to Unveil New Integrated Platform at SMM

Digital navigation services and voyage compliance solutions provider ChartCo said…

© Konstantin L/Adobe Stock

Analysis: Government Proposal 'Ill-informed' on Maritime Matters

On June 22, 2018, the Office of Management and Budget (OMB) issued a federal government…

Christophe de Margerie (Photo: Sovcomflot)

LNG Carrier Completes Record Arctic Transit

An icebreaking liquefied natural gas (LNG) carrier has completed a record journey…

(Photo: Milaha)

Milaha Reports Improved H1 Profits

Shipping conglomerate Qatar Navigation (Milaha) Q.P.S.C. announced its financial…

Courtesy of Intelsat

Maritime Operators Embrace Digital Transformation

As maritime operators deal with challenging operating conditions, many are embracing…

The Great Lakes-St. Lawrence Seaway System their connecting channels and the St. Lawrence River, serves the industrial and agricultural heartland of the U.S. and Canada. Photo provided by The Great Lakes Seaway Partnership

Great Lakes Shipping Supports 237,000 Plus Jobs

The new study by the Department of Transportation Great Lakes - Saint Lawrence Seaway…

(Photo: FarSounder)

FarSounder-1000s for New Expedition Cruise Ships

U.S. based marine electronics manufacturer FarSounder said it has received an order…

Marlink's €622m Dividend Recapitalization Loan Pulled

A €622m-equivalent dividend recapitalization and refinancing loan for Norwegian satellite…

Jörgen Strandberg, Captain, General Manager of ANC Advanced Technology Electrical & Automation at Wärtsilä SAM Electronics.

Maritime Tech Trends Digital

With digitalization technologies sweeping through maritime, Henrik Segercrantz, Maritime…

(Photo: Metal Shark)

Metal Shark, ASV Global Roll Out Autonomous Vessels

U.S. shipbuilder Metal Shark has joined forces with autonomous vessel technology…

Related Articles

Ship Simulators

A ship simulator is an advanced training device; an electronic or mechanical system used to expose vessel operators and crew members to typical shipboard conditions and systems. Simulation training is not a substitute for the experience of training on an actual vessel…

Pod Propulsion

Pods are devices which combine both propulsive and steering functions in one device. They are usually located below the stern of a ship, making use of the following internal components: a fix pitch propeller, shaft, thrust and support bearings…

Maritime Security

Maritime Security is a term which applies to a large variety of technology, devices, and operations both on deck and on shore. It can mean the simple measures used by boat owners and operators to protect individuals, vessels, and cargo from theft, sabotage, or piracy.

Winch

A winch is a mechanism used to reel in, to let out, or otherwise adjust the tension of a rope, wire, or cable. Boats and ships make use of multiple winches to handle halyards, sheets, as well as anchor or mooring lines. The basic mechanism consists…

Ship Repair

All ships need maintenance and repairs. Many repair and maintanance operations can be performed at sea or by the crew in port. Complicated or large-scale repairs might require the ship to be removed from commercial operation. Classification…
Maritime Reporter Magazine Cover Aug 2018 - The Shipyard Edition

Maritime Reporter and Engineering News’ first edition was published in New York City in 1883 and became our flagship publication in 1939. It is the world’s largest audited circulation magazine serving the global maritime industry, delivering more insightful editorial and news to more industry decision makers than any other source.

Subscribe
Maritime Reporter E-News subscription

Maritime Reporter E-News is the subsea industry's largest circulation and most authoritative ENews Service, delivered to your Email three times per week

Subscribe for Maritime Reporter E-News