TT-3000E mini-C GMDSS User Manual - Polaris-as.dk

TT-3000E mini-C GMDSS User Manual
3 INTRODUCTION TO INMARSAT-C
The Inmarsat-C is a communication system, which enables
the user to send and receive data to and from mobile
terminals. The Inmarsat-C system provides the possibility
of reaching remote areas where other methods of
communication are impossible.
3.1 SYSTEM OVERVIEW
The Inmarsat-C satellite network provides the link between
the mobile and the destination office. It uses four
geostationary satellites to cover the world. Satellite data
link coverage is complete between 70º North and 70º South.
Because the Polar regions cannot be seen from
geostationary satellites these regions are not covered.
The Inmarsat-C system contains 2 satellite stations types
that are of interest for the operator of the easyTrack MES:
The NCS stations and the LES stations.
The NCS stations handle the registration of the MES in the
Inmarsat-C system. The Inmarsat-C system has one NCS for
every geostationary satellite and they have names that
correspond to the ocean area they cover: Atlantic Ocean
Region East (AORE), Atlantic Ocean Region West (AORW),
Indian Ocean Region (IOR) and the Pacific Ocean Region
(POR). Before using the Inmarsat-C system the easyTrack
MES must be registered in one of the four ocean regions
through a Login on an NCS where the corresponding
satellite is visible from the current location. Normally this
login procedure will happen automatically when the
equipment is turned on.
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