jotron 103660, Operator And Installation Manual

Page: 96 / 104

Doc. No.: 103839 Rev. A
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Page 96 of 104
16 Abbreviations and Definitions
ACK Acknowledge
AIS Automatic Identification System - A shipborne broadcast transponder system in which ships
continually transmit their position, course, speed and other data to other nearby ships and shoreline
authorities on a common VHF radio channel.
AIS-SART Automatic Identification System-Search And Rescue Transponder
AtoN Aid to Navigation
BAUD Transmission rate unit of measurement for binary coded data (bit per second).
BNC Bayonet Neill-Concelman connector – common type of RF connector used for coaxial cable
BRG Bearing
CPA Closest Point of Approach
COG Course Over Ground – Course made good relative to the sea bed.
DSC Digital Selective Calling
DGNSS Differential GNSS
DGPS Differential GPS – A method of refining GPS position solution accuracy by modifying the locally
computed position solution with correction signals from an external reference GPS CDU (monitor).
ECDIS Electronic Chart Display and Information System for navigation approved to be used without paper
charts
ECS Electronic Chart System
EPIRB Emergency Position Indicating Radio Beacon
EOL End of Life
EPFS Electronic Position Fixing System (GPS is mostly used)
ETA Estimated Time of Arrival. Calculated on basis of the distance to the destination and the current (or
estimated) speed.
FM Frequency Modulation - The method by which a signal offsets the frequency in order to modulate it
on a data link.
GNSS Global Navigation Satellite System – A common label for satellite navigation systems (such as GPS and
GLONASS).
GPS Global Positioning System – The NAVSTAR Global Positioning System, which consists of or-biting
satellites, a network of ground control stations, and user positioning and navigation equipment. The
system has 24 satellites plus 3 active spare satellites in six orbital planes about 20,200 kilometers
above the earth.
GLONASS A satellite navigation system developed and operated by Russia.
GMT Greenwich Mean Time