82694_
Op&Ins MAN_RA2500_D 3
COG
See COURSE OVER GROUND
COURSE OVER GROUND
Course made good relative to the sea bed.
CURSOR
A flashing rectangle superimposed on a character position in the display window, indicating that a character may be
entered in that position, or that the existing character may be changed via the keyboard.
DEFAULT
A condition that the navigator assumes automatically if no other condition is initiated by the operator.
DGPS
See DIFFERENTIAL GPS.
DIFFERENTIAL GPS (OOPS)
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
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.
FATDMA
Fixed Access Time Division Multiple Access -Data link access protocol used by base station transponders to allocate
transmission slots on the data link. These slots are fixed and will thus not change until the base station transponder is re-
configured.
FM
Frequency Modulation -The method by which a signal offsets the frequency in order to modulate it on a data link.
position (latitude, longitude, altitude, and time). See DILUTION OF PRECISION.
GFSK
Gaussian-Filtered-Shift-Keying -A standardised method of modulating digital data prior to transmission on a data link.
GMSK
Gaussian-Minimum-Shift-Keying -GFSK using BT -products and modulation index, which optimises the modulated
signal.
GNSS
Global Navigation Satellite System -A common label for satellite navigation systems (such as GPS and GLONASS).
GLOBAL POSITIONING SYSTEM (GPS)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 kilometres above the earth.
GLONASS
A satellite navigation system developed and operated by Russia.
Summary of Contents for RA-2500
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Page 52: ...82693_Op Ins MAN_TR2500_D 10 1 10 OUTLINE DRAWINGS 10 1 TR 2500 AIS Transponder...
Page 53: ...82694_Op Ins MAN_RA2500_D 10 2 10 2 Procom CXL 2 1 l Maritime VHF Antenna with FLG Bracket...
Page 54: ...82694_Op Ins MAN_RA2500_D 10 3 10 3 Procom GPS 4 Antenna...
Page 59: ...82694_Op Ins MAN_RA2500_D 11 2...
