ARPA
Your ARPA has been tracking a target for 3 min. the radar did not receive an echo from the target for 2
successive scans. What will happen? - Answer-The ARPA will continue to track as if the RADAR was still
receiving a target echo. The tracking gate will become larger.
As confidence in a target predicted movement increases: - Answer-The tracking gate size decreases.
An input error from your Doppler speed log: - Answer-is the most common APRA error not involving
display interpretation
you notice the history dots on a tracked target getting farther apart. This may indicate that: - Answer-the
target has increased speed
in trail maneuver mode, the effect of the proposed maneuver is displayed: - Answer-with the use of
relative vectors
ARPA can preform tracking functions on AIS without radar information. (T/F) - Answer-True
Locating a contact by the range and bearing can best be described as using: - Answer-the polar
coordinate system.
How can vessel personnel detect the operation of a SART in its vicinity? - Answer-A unique signal
consisting of a blip code radiating outward from a SART's position along its line bearing
What is the purpose or function of the "Trial Mode" used in most ARPA equipment? - Answer-it is used
to allow results of proposed maneuvers to be assessed.
, The process the controls the tracking gate: - Answer-rate aiding or smoothing
11) What does the acronym ARPA stand for? - Answer-Automatic radar plotting aid
Benefit of a small tracking gate is: - Answer-Less likely to experience target swop due to clutter and
other targets passing close by or into the gate.
Parallel index lines: - Answer-require gyro stabilization
The benefit of true vector use is: - Answer-All are correct statements.
When using ARPA fitted radars in heavy rain, what action should you take? - Answer-all are correct
answers
relative target motion relies on: - Answer-target persistence and strength
target swap may occur when two targets: - Answer-pass close together
Changing from short to longer range scales may result in a lost contact alarm (T/F) - Answer-False
identify the correct manual plot vector label that best represents an ARPA true vector. - Answer-e-m
the term acquire and designate mean the same thing. (T/F) - Answer-False
Target swap: - Answer-can ruin an auto drift plot
Your ARPA has been tracking a target for 3 min. the radar did not receive an echo from the target for 2
successive scans. What will happen? - Answer-The ARPA will continue to track as if the RADAR was still
receiving a target echo. The tracking gate will become larger.
As confidence in a target predicted movement increases: - Answer-The tracking gate size decreases.
An input error from your Doppler speed log: - Answer-is the most common APRA error not involving
display interpretation
you notice the history dots on a tracked target getting farther apart. This may indicate that: - Answer-the
target has increased speed
in trail maneuver mode, the effect of the proposed maneuver is displayed: - Answer-with the use of
relative vectors
ARPA can preform tracking functions on AIS without radar information. (T/F) - Answer-True
Locating a contact by the range and bearing can best be described as using: - Answer-the polar
coordinate system.
How can vessel personnel detect the operation of a SART in its vicinity? - Answer-A unique signal
consisting of a blip code radiating outward from a SART's position along its line bearing
What is the purpose or function of the "Trial Mode" used in most ARPA equipment? - Answer-it is used
to allow results of proposed maneuvers to be assessed.
, The process the controls the tracking gate: - Answer-rate aiding or smoothing
11) What does the acronym ARPA stand for? - Answer-Automatic radar plotting aid
Benefit of a small tracking gate is: - Answer-Less likely to experience target swop due to clutter and
other targets passing close by or into the gate.
Parallel index lines: - Answer-require gyro stabilization
The benefit of true vector use is: - Answer-All are correct statements.
When using ARPA fitted radars in heavy rain, what action should you take? - Answer-all are correct
answers
relative target motion relies on: - Answer-target persistence and strength
target swap may occur when two targets: - Answer-pass close together
Changing from short to longer range scales may result in a lost contact alarm (T/F) - Answer-False
identify the correct manual plot vector label that best represents an ARPA true vector. - Answer-e-m
the term acquire and designate mean the same thing. (T/F) - Answer-False
Target swap: - Answer-can ruin an auto drift plot
