Displaying Arpa Target Data; Viewing Arpa Data Of Normal Targets - Furuno FEA-2107 Operator's Manual

20.2

Displaying ARPA Target Data

20.2.1

Viewing ARPA data of normal targets

On the ECDIS display, place the cursor on a desired ARPA radar target and then push the thumbwheel.
ARPA Radar target on ECDIS display ARPA target display window
The basic target display dialog for an ARPA radar target consists of the following information:
•
Target's number
•
Bearing (BRG) and distance (RNG) of the target from own ship
•
True speed (SPD) and true course (CSE) of the target
•
CPA and TCPA. Note that if TCPA has a negative value, this means that you have already passed the closest
point and the ARPA target is going away from own ship.
•
Bow Closest Range (BCR) and Bow Closest Time (BCT)
The detailed target display dialog for an ARPA radar target displays the contents of the basic ARPA target display
plus the following information. To display detailed information, push the left mouse button.
• Status of target. Status can be Query, Tracking or Lost. "Query" indicates a new target for which there is not yet
enough tracking history to have target speed, course, CPA and TCPA available.
• Position of target (Lat, Lon)
User can set Closest Point of Approach (CPA), and Time for CPA (TCPA) to define dangerous ARPA targets. CPA
and TCPA limits are common for ECDIS display and danger target log function of ARPA and AIS targets. On the
ECDIS display, a dangerous ARPA target blinks in green and red color alternately.
Note that the CPA and TCPA limits are only for
ECDIS. ARPA radar has its own setting for dangerous
targets and thus a target which is dangerous on the
ARPA display can be safe on ECDIS and vice versa.
If an ARPA target is within the CPA and TCPA
settings, it is shown as a dangerous ARPA target on
the ECDIS display. Log interval defines time period
for logging.
20. ARPA Target Functions
ARPA target display with details
True Vect(G) 12 nm
Past PosnTrue 2 min
CPA 1.5 nm 10 min
20-3