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LES TDM channel:
A TDM channel used by an LES to transmit system information and data addressed to
an MES.
LMSS ...................................................................................... Land Mobile Satellite Service
Log in:
The action performed on an Inmarsat C MES to inform the NCS in an ocean region that
the MES is available for communications.
Log out:
The action performed on an Inmarsat C MES to inform the NCS in an ocean region that
the MES is not available for communication.
LNA ........................................................................................................ Low Noise Amplifier
LSB..........................................................................................................Least Significant Bit
LT ........................................................................................................................... Local Time
M
Member number:
The number downloaded with a DNID to an MES, when the MES is registered to a
data-reporting network.
MES....................................................................................................... Mobile Earth Station
Mobile Earth Station. A mobile user terminal in the maritime mobile-satellite service
located aboard a ship.
Message channel:
A channel assigned by the NCS for an MES to send a message through an LES to its
required destination.
METAREA:
A geographical sea area established for the purpose of co ordinating the broadcast of
marine meteorological information.
MHS ..............................................................................................Message Handling System
MID ..............................................................................................Mobile Identification Digit
3-digit number which identify the country of registration of the mobile terminal (or
similar definition)
MMSI ............................................................................... Maritime Mobile Service Identity
A nine-digit format assigned by the maritime authority to identify a vessel. The first
three digits are the code of the country where the vessel is registered as defined by the
ITU.
MMSS .............................................................................. Maritime Mobile Satellite Service
MOD........................................................................................................................ Modulator
Modem ......................................................................................... MODulator/DEModulator
A device used to transmit digital data, by converting (modulating) a digital signal into an
analogue form and re-converting (demodulating) the analogue signal into digital form at
the receiving end.
MSB......................................................................................................... Most Significant Bit
MSI...........................................................................................Maritime Safety Information
Navigational and meteorological warnings, meteorological forecasts and other urgent
safety-related messages broadcast to ships (as defined in Regulation IV/2 of the 1974
SOLAS Convention, as amended).
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