HOW
IT WORKS
Most vessels
now carry a GPS (Global Positioning System)
receiver and this is a mandatory requirement
(for vessels over 300gt) as part of the
Global Marine Distress and Safety System
(GMDSS). By connecting the GPS to suitable
radio equipment, the vessel may be interrogated
by a shore station over VHF channel 70 using
Digital Selective Calling (DSC) and can
automatically respond with information relating
to the vessel’s course, size, passage
and cargo. Ships may also use suitable systems
to identify each other accurately and quickly
for collision avoidance.
Vessels
may be routinely polled and their positions
automatically plotted within a vessel tracking
system. As well as being conveniently visually
displayed, vessel information is stored
in the system’s database, providing
a valuable log of vessel movements.
VTS2000
currently supports Sailor VHF VTS equipment
(RT2048/RM2042, including basket) or suitable
VHF DSC VTS radio equipment from other manufacturers
which supports NMEA0183 protocols, e.g.
ICS Electronics. It works with the widely
used TCP/IP networking protocol to give
simple and scalable tracking network solutions,
even over the Internet.
VTS2000
works by transmitting a special DSC command
via the VHF radio to the on-board radio,
if appropriate, the radio will return the
vessel's current position etc. The system
can be set so that only vessels in a specific
area, heading or type respond. The received
vessel information is logged and the positions
displayed on a high quality Livechart digital
chart. The level of detail shown can be
set by the user. |