8-34D: EBL, Azimuth, and True Bearing Flashcards
Display and Control Systems (4 cards)
8-34D1
The purpose of the Electronic Bearing Line is to:
A. Indicate your own vessel’s heading.
B. Measure the bearing of a specific target.
C. Indicate True North.
D. Display the range of a specific target.
ANSWER B
It is likely that a RADAR indicator may also include a variable electronic bearing line. This allows you to move the cursor so that the EBS intersects a specific echo. The EBL is a BEARING to that echo.
8-34D3
Which of the following inputs is required to indicate azimuth?
A. Gyro signals.
B. Synchronizer
C. Resolver.
D. Range rings.
ANSWER A
In order for the RADAR to indicate azimuth, it will need an input from a gyro compass or the modern fluxgate compass readout.
8-34D4
Bearing information from the gyro is used to provide the following:
A. The heading of the nearest target
B. Range and bearing to the nearest target.
C. Vessel’s own heading
D. The range of the selected target
ANSWER C
The gyro provides the vessel’s true heading to a readout at the helm station, plus redundant readouts throughout the bridge and to the automatic pilot. The gyro also feeds the RADAR, which displays the vessel’s true heading as well as true North.
8-34D5
Which of the following statements about “true bearing” is correct?
A. The ship’s heading flasher is at the top of the screen.
B. True North is at the top of the screen and the heading flasher indicates the vessel’s course.
C. The true bearing of the nearest target is indicated.
D. The relative bearing of the nearest target is indicated.
ANSWER B
RADARs fed by a gyro or fluxgate compass may incorporate an inicator outside the compass rose that will illustrate true north. This will be at the top of the screen, and the heading flasher indicates the vesse’s course.
