17
DEFINITION OF TERMS
DSC :
Digital Selective Calling System
GMDSS :
Global Maritime Distress and Safety System
GPS :
Global Positioning System
IMO :
International Maritime Organization
ITU :
International Telecommunication Union
– Polices treaties and regulations in all commu-
nication media including wire, radio, land,
marine, space, and outer space communica-
tions. WARC, CCIR, and CCITT are sub-unions
of the ITU.
ITU-R(CCIR) :
Radiocommunication Sector (International
Radio Consultative Committee)
MF :
Medium Frequency (300kHz – 3MHz)
NMEA0183 :
Communication standard for navigation sys-
tems as specified by the National Marine
Electronics Association, U.S.
NNSS :
Navy Navigation Satellite System
RCC :
Rescue Co-ordinate Center.
R.R :
Radio Regulations
SAR :
International Convention on Maritime Search
and Rescue
SCAN :
Function which automatically searches for
receivable signals in selected channels.
SOLAS :
International Convention for Safety of Life at
Sea – A certification is issued to ships which
satisfy this convention.
UTC :
Universal Time Coordinated
VHF :
Very High Frequency (30MHz – 300MHz)
WARC :
World Administrative Radio Conference (an ITU
sub-union)
WMO :
World Meteorological Organization
WKR :
Watchkeeping Receiver
This chapter contains definitions of terms related to general operation, and also describes the
general maritime terms and radio terms.
General Terms
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