JRC JMA-3400 Series, Instruction Manual, Page: 44 / 314

GLOSSARY
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GLOSSARY
This section describes the main terms used for this equipment and general related maritime terms.
A
Activated target A target representing the automatic or manual activation of a sleeping target for the display of
additional information.
AIS Automatic Identification System
A system which enables ships and shore stations to obtain identifying and navigation information
about other ships at sea, using an automated transponder.
Anti-clutter rain Rain/snow clutter suppression.
Anti-clutter sea Sea clutter suppression.
AZ Acquisition/Activation zone
A zone set up by the operator in which the system should automatically acquire radar targets and
activate reported AIS targets when entering the zone.
AZI Azimuth stabilization mode
B
BCR/BCT Bow Crossing Range and Bow Crossing Time
Beacon In this manual it means radio station that is already known accurate position.
DGPS use to calculate for higher accuracy than GPS.
Bft. Beaufort
scale
0: Calm, 1: Light air, 2: Light breeze, 3: Gentle breeze, 4: Moderate breeze,
5: Fresh breeze, 6: Strong breeze, 7: High wind, 8: fresh gale,
9: Strong gale, 10: Storm, 11: Violent storm, 12: Hurricane
C
C-UP Course up
Own ship’s course is pointed to the top center of the radar display.
CCRP The Consistent Common Reference Point
A location on own ship, to which all horizontal measurements such as target range, bearing,
relative course, relative speed, CPA or TCPA are referenced, typically the
conning position of the bridge.
Clutter Unwanted reflections on a radar screen, from sea surface, rain or snow.
COG Course Over Ground
The direction of the ship's movement relative to the earth, measured on board the ship,
expressed in angular units from true north
Compass A device indicates the direction.
CORREL Correlation
CPA/TCPA The distance to the Closest Point of Approach and Time to the Closest Point of
Approach. Limits are set by the operator and are related to own ship.
CTW Course Through Water
The direction of the ship's movement through the water
D
DGPS Differential Global Positioning System
DRIFT The
current velocity for manual correction or the current speed on the horizontal axis of the 2-axis
log is displayed.
E
EBL Electronic Bearing Line
An electronic bearing line originated from own ship’s position.
ENH Enhance