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ROU EXAM QUESTIONS AND ANSWERS
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ROU EXAM QUESTIONS ANDANSWERS
What control measures would you take to lessen the clutter caused by rain
squalls?
FTC: Fast Time Constant
What controls would you implement to limit the clutter caused by sea return?
STC: Sensitivity Time Control
Which frequency bands do radar waves transmit?
S-Band 3,000 MHz, 10 cm
X-band 9,000–10,000 MHz 3 cm
In general, is a radar range more precise than a radar bearing?
Range since it has a beam width issue.
What factors influence the maximum distance that a target can be detected?
- Pulse repetition rate
- Pulse length.
- Pulse width
- Range Scale
Which radar band provides the highest resolution at close range?
X-band is higher in frequency.
, What display mode is recommended?
North up - stable - relative motion.
What causes nearby islands to look as one on a radar screen?
Horizontal beam width.
What is the lowest distance at which your vessel's radar can identify a target?
1/2 pulse width.
List some of the features of indirect echoes.
Bounces off a portion of the ship and reappears at a different spot.
What circumstances produce many echoes?
Close ship nearby
What factors influence the minimum range of your radar?
Cold air has high refraction; excellent.
Refraction of hot air is not good.
Ducting
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