Satellite communication facilities are
provided by the International Maritime
Satellite Organization, INMARSAT. The
organization was founded in September
3, 1976 and first introduced into the
global commercial operation in 1982.
Its main task is to provide satellitebased services for maritime
communication, and to improve
distress and safety services.
Telephone and Telex
Inmarsat-B
Inmarsat-Fleet 77
Telex
Inmarsat-C
Telephone
Inmarsat-M
Overview
Three Major Components:
Satellite
Coast Earth Stations (CES)
Ship Earth Stations (SES); Land-Mobile Earth
Stations (LMES); Aircraft Earth Stations (AES)
Satellite
CES
SES; LMES; AES
Network Operations Centre
The “heart” of the system is the NOC located at
Inmarsat headquarters in London. Operating 24
hours a day, it monitors, co-ordinates and controls
the operational activities of all satellites in the
network.
Ocean Region Satellites:
AORW – Atlantic Ocean Region West
AORE – Atlantic Ocean Region East
IOR – Indian Ocean Region
POR – Pacific Ocean Region
Equipment
Telex
Telephone
Inmarsat-B
580
870
Inmarsat-C
580
Inmarsat-M
Fleet-77
870
580
870
The Space Segment
Geostationary Orbit
35,700 Km over the major ocean regions
Moves at exactly the same rate as the rotation
of the earth
Equipped with solar panels
Almost Global coverage with the exception of
the polar regions above 76 degrees North and
below 76 degrees South
Able to handle up to 400 simultaneous phone
calls, or several thousand messages.
Network Co-ordinating Station
It is located within each ocean region
Acts as a type of switch operator; assigning,
controlling and monitoring all of the telephone and
telex channels between the SES and the CES.
OCEAN
REGION 1
OCEAN
REGION 2
LES
LES
NOC
MES
MES
NCS
NCS