Appendix 3 Terminology - JRC JLR-20 Instruction Manual

Appendix 3 Terminology

Term
2D (2 dimension)
3D (3 dimension)
AD-10
ARPA
Bow Heading
Checksum
COG
CURRENT
DISP-DPU
DGPS
DR
FRAM
Geodetic
GPS Repecon
GPS Satellite (GPS)
HDG
HDOP
IEC60945
IPX
LCD Unit (LCD)
Meaning
Positioning with antenna elevation height in addition to satellite data.
The three dimensional position fix, 4 or more satellites required.
Transmission method for handling bow heading data.
Automatic Radar Plotting Aids, equipment for automatic collision
avoidance.
Angle between the ship's bow and meridian.
An error detection method to check that the data has been correctly
transmitted.
Course Over Ground.
Sea and ocean currents, expressed in speed and direction.
The main circuitry of display unit.
Abbreviation of Differential Global Positioning System. GPS satellite
error data sent from a reference station whose position is accurately
known is received via beacon from a beacon station, improving
positioning accuracy.
Abbreviation of Dead Reckoning. Reckoning of course and distance
with the aid of Gyro and ship's speed.
Nonvolatile memory using a ferroelectric substance.
Conditions for expressing position via latitude and longitude.
Device for synchro / step conversion of true bearing signal output by
GPS compass.
Abbreviation of Global Positioning System. Refers to satellites
launched for navigational support of military vessels managed by the
United States Department of Defense.
Abbreviation of Heading, indicating heading of ship's bow.
Abbreviation of Horizontal Dilution of Precision. Indicates accuracy
of positioning. The smaller the number, the higher the accuracy. If
GPS satellites are unevenly distributed, this number will grow. If
GPS satellites are evenly distributed, this number will be smaller.
IEC is the abbreviation of International Electrotechnical Commission.
It is an international standard governing electrical and electronic
technologies.
IPX is a standard of waterproofing, there are nine grades (0 - 8).
(IPX4: splash-proof, IPX6: waterproof)
Liquid Crystal Display Unit.
Appendix 3-1