LRIT
What is LRIT?
Long
Range Identification & Tracking
What is the purpose of LRIT?
Providing
position report time to time to the shore concerned authority
for
security and search and rescue purposes
what type of vessels comply with LRIT?
All passenger ships including High Speed Crafts,
cargo ships including 300 gross tonnage
and vessels
engaged on international voyages.
Which type of
vessels need not comply with LRIT?
Ships operating only in Area A1
What is the information provided in
LRIT?
Ship’s
identity, (Unique Identifier)
Position
in Latitude & Longitude
And
Date and time of the position
How the LRIT is transmitted from the
ship?
Automatically
The ship transmitting the ship's LRIT information
at 6-hour intervals to an LRIT Data
Centre;
Transmitting LRIT information following receipt
of polling commands
What is
the difference between LRIT and AIS?
AIS
is a broadcast system
LRIT
is transmitted to a particular station at pre fixed intervals or
By
polling command
Explain the
LRIT system?
Ship borne LRIT transmitting equipment
Communication Service Providers
Application Service Providers
LRIT Data Centres, plus any related Vessel Monitoring
Systems
The LRIT Data Distribution Plan
The International LRIT Data Exchange
GMDSS
VASU PH: 096299 80476 e mail ID: vasurc@gmail.com
Where is the
LRIT information transmitted?
Ships
transmit the LRIT information to the LRIT Data Centre selected by their Administration.
Who are the
LRIT users?
Flag state may track ships within its own fleet
anywhere in the world.
Port State may set its own requirements for
ships that have indicated that they intend to call at its ports based on Notice
of Arrival (NOA)
Coastal States may obtain tracking
information for ships navigating within a distance up to 1000 nautical miles
off their coast (this applies to ships not intending to call and not flying
that state's flag - in other words, ships on innocent passage).
Additionally Contracting Governments can request information on
ships in an area where a Search and Rescue operation is underway.
Which equipment is used for LRIT?
SAT
C or mini-C
Which satellite network is used for
LRIT?
INMARSAT
INMARSAT does not cover sea area A4.
What is the other satellite network is
Used for LRIT?
POLESTAR
LRIT system which will use IRIDIUM satellites for forwarding the LIRIT message
When can LRIT be Switch off?
At dry docks or laid off for long repairs
Coastal vessels – during monsoon at harbor
Can LRIT be
used in sea area A4? How?
If POLESTAR is used, it can be used in sea area A4.
Polestar is a low polar orbiting satellite and has a
global coverage.
