NAEST Rev 1b - EM Waves, Radar & ARPA ver2 (clean) Questions with Correct Answers
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NAEST Rev 1b - EM Waves, Radar & ARPA ver2 (clean) Questions with Correct Answers
With more range and bearing information available, ARPA tracking window gets progressively
Select one:
a. Smaller
b. Bigger
c. Stays the same in size
d. circular - Correct Answer a
Radar horizon is larger tha...
NAEST Rev 1b - EM Waves, Radar &
ARPA ver2 (clean) Questions with
Correct Answers
With more range and bearing information available, ARPA tracking window gets progressively
Select one:
a. Smaller
b. Bigger
c. Stays the same in size
d. circular - Correct Answer a
Radar horizon is larger than TH
Select one:
a. 25%
b. 20%
c. 15%
d. 10% - Correct Answer c
ARPA Operators are advised to allow approximately one minute of steady tracking before using the
track data (course, speed, CPA, TCPA). - Correct Answer false
The position of the target in the echo shape is along the centreline of the echo at the leading edge. -
Correct Answer true
Target swap of ARPA acquired targets can occur even when targets pass far away from each other. -
Correct Answer false
Own course and speed input error will affect the accuracy of the true vector. - Correct Answer true
In accordance with Performance Standards adopted in December 2004 an ARPA must have how
many alarm signals?
Select one:
a. One
,b. Three
c. Five
d. Seven - Correct Answer b
Radar pulse amplitude causes error in range and bearing of targets. - Correct Answer true
RM display
Select one:
a. Shows tgts moving along a relative LOA
b. Co & Spd of any tgt obtained by plotting
c. Is Used for Coll Avoidance
d. All options apply - Correct Answer d
After offset and set of radar picture, trails should be available in
Select one:
a. 2 sweeps
b. 5 sweeps
c. 10 sweeps
d. 15 sweeps - Correct Answer a
ARPA operator alarms and alerts must Include
Select one:
a. collision threat
b. lost target
c. zone or minimum range
d. all of above - Correct Answer d
Noise
Select one:
a. is caused by electrons in a circuit
b. shows up on screen like specs on screen
, c. weak targets can get swamped if settings are not correct
d. Any of above - Correct Answer d
Target swap may happen when a tracked target enters a clutter area. - Correct Answer true
EM field moves between WG covers by
Select one:
a. Reflection
b. Refraction
c. Diffraction
d. Super refraction - Correct Answer a
Rain clutter control
Select one:
a. Narrows the HBW & VBW
b. Reduces echo size on entire screen
c. Both of above
d. None of above - Correct Answer b
Whether the ARPA is sea or ground stabilized; will have no effect on CPA or TCPA. - Correct Answer
true
Target characteristics that influence echo shape
Select one:
a. Surface texture
b. Aspect
c. Material
d. All of above - Correct Answer d
It is possible for observers to confuse between True/Relative Motion presentation being used. -
Correct Answer true
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