Installation Manual Part 3

TR-8000 Operator and Installation Manual 110
15 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
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.