Marine Link
Monday, October 15, 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: ChartCo)

ChartCo and MeteoGroup Partner

Global supplier of maritime digital data and compliance services ChartCo has selected…

Photo: BMT

BMT’s REMBRANDT Receives Full Mission DNV GL Certification

BMT’s integrated navigation and maneuvering simulator suite REMBRANDT has been awarded Class A…

Jeong-kie Lee, Chairman and CEO, Korean Register

Interview: Jeong-kie Lee, Chairman, Korean Register & IACS

This month we caught up with Jeong-kie Lee, Chairman and CEO of the Korean Register…

The port of Wilmington, NC (CREDIT: NC Ports)

Coast Guard reopens North Carolina, Virginia ports

The Captain of the Port for Hampton Roads has reopened the port without restrictions…

Lt. j.g. Ryan Thomas, a marine Inspector at Coast Guard Sector Delaware Bay, walks below the Kaimana Hila, an 850-foot container ship being constructed in Philadelphia Shipyards, Oct. 4, 2018. The Kaimana Hila and the Daniel K. Inouye are the two largest containerships ever built in the U.S. (Coast Guard photo by Seth Johnson)

How the Coast Guard Supports the Shipbuilding Industry

The U.S. Coast Guard is known for saving lives at sea, but did you know the service…

File Image: AdobeStock / © SunnyS

AWIA/WRDA Overwhelmingly Passes in Senate

Bill now heads to White House for President Trump’s signature.Today, the Senate voted…

(Photo: GONDAN)

Sweden’s New Hybrid Icebreaking Tug Launched

A new hybrid-electric icebreaking escort tug for Sweden's Port of Luleå was launched…

Pic: The Port of Rotterdam Authority

Rotterdam Port Tests Autonomous Navigation

In order to prepare the Port of Rotterdam Authority for the arrival of autonomous navigation…

(Photo: ITB)

ITB Christens New Tug Island Raider

Island Raider, the newest articulating tug in Island Tug and Barge’s (ITB) fleet…

(Image: Raytheon Anschütz)

Raytheon Anschütz Unveils New Naval Radar Software

Naval system integrator Raytheon Anschütz announced a new radar software for naval vessels…

Mike Hammond (left) and Stephan Dimke. Photo: Britannia Maritime Consultants

Britannia Maritime Consultants Appoints Mike Hammond, Stephan Dimke

Britannia Maritime Consultants has announced two senior appointments as part of its…

Group photo of representatives from the international maritime community with Guest of Honour, Minister Khaw Boon Wan. Photo: Maritime and Port Authority of Singapore

Global Maritime Community Strengthen Co-Operation in SOMS

More than 180 participants from around 80 maritime administrations and organisations…

Related Articles

Pipelines

Modern pipelines are installed with and other control devices (pumps and valves) to efficiently move liquids, gases, slurries (solid particulates in liquid suspension) and even solids. Pipelines usually consist of welded sections of metal pipe…

Maritime Standards

All nations require certain standards be met by ships and other marine structures which fly their flag. A classification society, or "Class", is a non-governmental regulatory association which regulates construction of vessels and offshore structures in the maritime industry.

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 Electronics

Electronic devices classed for use in the marine environment. All electronics used onboard must be designed to fit in the small confines of a bridge and can come in contact with salt water, so they are made to be very water resistant or waterproof.

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 Oct 2018 - Marine Design Annual

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