Wednesday, July 1, 2009

Around the World.....Across the Seas.......




Down below is a link to a live map, which will help you to find where I am......... right now !!!?

http://www.marinetraffic.com/ais/default.aspx?level0=100

Mainly this works with a system call AIS(Automatic Identification System) Simply Works as a VHF transceiver which can identify another ship within its VHF range(50 Nautical Miles).Here some more info about AIS........



The Automatic Identification System (AIS) is a system used by ships and Vessel Traffic Services (VTS) principally for identification and locating vessels. AIS provides a means for ships to electronically exchange ship data including: identification, position, course, and speed, with other nearby ships and VTS stations. This information can be displayed on a screen or an ECDIS display. AIS is intended to assist the vessel's watchstanding officers and allow maritime authorities to track and monitor vessel movements. It works by integrating a standardized VHF transceiver system with an electronic navigation system, such as a LORAN-C (LOng RAnge Navigation Version C) or Global Positioning System receiver, and other navigational sensors on board ship (gyrocompass, rate of turn indicator, etc.).
The
International Maritime Organization's (IMO) International Convention for the Safety of Life at Sea (SOLAS) requires AIS to be fitted aboard international voyaging ships with gross tonnage (GT) of 300 or more tons, and all passenger ships regardless of size. It is estimated that more than 40,000 ships currently carry AIS class A equipment.[citation needed]
For long range tracking system on ships, less frequent transmission can be achieved by
LRIT (Long-Range Identification and Tracking System) for ship trading outside coastal AIS (VHF or A1) Radio range .

But this system has its limitations....... as I mentioned earlier this work only within the VHF range. Since this map managed by Land VTS stations in combination...... they can detect a ship only when those are at ports, during arrival, departure or when steaming within a range of 100 nautical miles from land.
the good news is that soon whole World Fleet will equipped with LRIT, unlike AIS they use satellites for transmitting and reception...............

Welcome to the world of shipping

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