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NEW ROU TEST QUESTIONS AND ANSWERS
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NEW ROU TEST QUESTIONS AND ANSWERS...
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NEW 2024-2025 ROU TEST QUESTIONSAND ANSWERS
The ship's head-up relative motion radar display was the first mode to be
developed. Identify two downsides of this type of display setting. - ANSWER 1.
Own ship at the centre; yawing will smear targets; heading flasher points to
zero.
2. Relative bearings may not align with the chart.
What display mode is recommended? - ANSWER: North up
Stabilized
Relative Motion
Identify one advantage of the Ship's Head-Up unstabilized relative motion radar
display mode. - ANSWER The visual orientation matches the radar orientation.
Can use without sensor inputs.
What information must be supplied into a radar display to show "true motion"? -
ANSWER Gyro and Speed input
How does the course-up stabilized relative motion display differ from the head-
up unstabilised radar display? - ANSWER Gyro input
True Bearing
Stabilized ARPA display
, Is the bearing circle around the radar screen usable when the screen's center is
offset? In other words, can you take bearings from ownship using an EBL while
the screen's center is offset? - ANSWER Visual orientation does not match
radar display, unless headed north.
Identify at least one downside of the North-up stabilized relative motion
display. - ANSWER Unless you are facing north, your visual orientation does
not match the radar display.
Unstabilized radar simply shows relative bearings. What should be added to get
an accurate bearing? - ANSWER Course steered divided by (R + S) equals T.
What approach can be used to determine whether your own ship is being set by
current? - ANSWER EBL: Cursor Offset
Parallel Index Lines
Which edge of a RACON signal is utilized to determine range (inner or outer
edge, measured from the center)? - ANSWER Inner-RACON is a coded signal
emitted by a buoy for identification.
Is it safe to utilize a buoy with the parallel indexing technique on an
unstabilized radar? Assume there's a strong current. - Answer No.
Does the land mass depicted by the radar resemble the actual land mass on the
chart? - Answer No.
What are the key reasons for the radar's distortion of land mass? - ANSWER
Beam width distortion
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