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WorksheetsRadar Navigation Quiz 3 final 10267
Total questions: 45
Worksheet time: 33mins
Which action should be taken if a target’s bearing exceeds acceptable limits?
Ignore the target
Reassess the radar settings
Report the target immediately
Adjust the radar position
In restricted visibility, radar shows a vessel at 6 NM, bearing 030° relative, with a CPA of 0.2 NM and TCPA of 12 minutes. According to COLREGs Rule 19, what is the most appropriate initial action?
Maintain course and speed, and monitor radar.
Immediately alter course to starboard.
Reduce speed, sound fog signals, and assess.
Contact the other vessel on VHF.
Using radar in clear visibility, a weak echo from a small fishing boat is crossing ahead. How should radar be used to prevent collision, as per COLREGs Rule 7 and 8?
Continuously track to determine risk of collision.
Disregard radar due to unreliability; rely on visual.
Increase radar gain/tune, then act only if necessary.
Immediately alter course to starboard without further analysis
A larger vessel is overtaking your vessel in a narrow channel, as shown on radar. How should the overtaken vessel primarily use radar to comply with COLREGs Rule 9?
To determine the exact speed and engine revolutions of the overtaking vessel.
To monitor the overtaking vessel's position and speed for safe passage.
To identify potential blind spots around the stern.
To assess the overtaking vessel's intentions and adjust course accordingly.
Your vessel is the 'give-way' vessel in a crossing situation, with the 'stand-on' vessel detected on radar. Which radar application is most beneficial to comply with COLREGs Rule 15 and 16?
Monitoring target's bearing drift for collision risk.
Utilizing True Motion display for relative movement.
Employing EBL and VRM to plot course and speed.
Activating AIS overlay for identity and communication.
In restricted visibility near a coastline, radar shows numerous land echoes. How should the navigating officer use radar to maintain safe speed as per COLREGs Rule 19?
Utilize radar to identify clear channels for appropriate speed.
Decrease radar range scale for immediate surroundings.
Increase radar gain for prominent echoes, even with clutter.
Rely primarily on ECDIS for navigation.
Approaching a port entrance with heavy traffic, radar shows vessels on reciprocal courses. How should radar be used to assess and respond to potential head-on situations as per COLREGs Rule 14?
By determining the precise bow-on aspect of all vessels.
By plotting targets to identify constant bearing, decreasing range.
By switching to short-range display for vessels within 1 NM.
By applying anti-clutter controls to remove unwanted echoes.
Radar detects a target on the port bow. After observation, its bearing shifts to starboard, and range decreases. According to COLREGs Rule 7, what is the most appropriate action?
Assume target will pass clear; continue course and speed.
Initiate broad alteration of course to port.
Take early and substantial action to alter course to starboard.
Contact VTS to report and request guidance.
When operating radar, significant 'sea clutter' is present in rough weather. How should the operator address this for effective collision avoidance, as per COLREGs Rule 5?
Increase radar gain to overcome clutter.
Adjust A/C Sea control to suppress wave echoes.
Switch to longer range scale.
Rely solely on visual lookout.
To ensure compliance with COLREGs Rule 2 when navigating near isolated dangers marked on the chart, which radar function is most effective for monitoring the vessel's position?
Using echo trail to track other vessels.
Employing radar parallel index lines for safe distance.
Activating guard zone alarm for any target entering an area.
Adjusting pulse length for maximum detection range.
In a congested area, radar shows multiple close targets. How can radar be best utilized to assess traffic density for compliance with COLREGs Rule 6 (Safe Speed)?
By identifying individual targets and estimating speeds/courses manually.
By utilizing ARPA to automatically track and display multiple target vectors.
By switching to 'relative motion' to identify collision courses.
By continuously adjusting tuning control for all targets.
As Officer of the Watch near a congested fairway, you engage ARPA functions on your radar. To comply with IMO MSC.192(79) and maintain navigational safety, what should you verify?
That ARPA reduces display clutter near coastlines
That ARPA provides accurate tidal prediction
That ARPA reliably tracks selected radar targets
That ARPA auto-calibrates radar range scales
While navigating through heavy rain and sea clutter, your radar display becomes unclear. What should you adjust to reduce the interference from weather effects?
Adjust gain to balance magnetic correction
Use tuning for electromagnetic alignment
Change the range for increased scan distance
Reduce clutter using sea and rain filters
Weak echoes from nearby small boats are not showing clearly on your radar. What adjustment should you make to improve target visibility?
Lower power to conserve radar transmission load
Enable weather overlay to display disturbances
Increase gain to enhance weak return signals
Change motion mode to course-up display format
While tracking multiple vessels, you estimate their distance from your ship. What radar feature should you rely on to assist in this?
Adjust gain to strengthen radar sensitivity
Activate heading marker for orientation aid
Zoom the display to enlarge contact echoes
Read range rings for target distance check
The radar is not detecting targets properly with automatic tuning enabled. What operator action would correct this?
Set alarms for closest point of approach checks
Manually adjust tuning to peak signal return
Switch to clutter filters to reduce interference
Configure tracking for radar plotting operation
You are trying to interpret the target bearing relative to your vessel’s heading. What radar feature helps orient your view correctly?
Display target range from ARPA plotting tools
Use weather input to verify wind orientation
Use heading marker to align with ship course
Apply deviation correction using compass offset
You notice a crew member standing close to a spinning radar antenna during transmission. What is the safest immediate action?
Tell them to report for duty elsewhere below deck
Ask them to wear ear protection and continue working
Instruct them to move away to reduce EMR exposure
Have them clean the radar unit after it powers off
The radar shows duplicate contacts near the coastline. What best explains this occurrence?
Power fluctuation or weak antenna performance
Radar echoes are being distorted by land clutter
Tre or false : The Range of Closest Point of Approach (RCPA) measures the bearing between two vessels at the farthest point of approach, calculated using radar data.
TRUE
FALSE
In a collision risk assessment using radar, the Bearing of Closest Point of Approach (BCPA) refers to the time at which two vessels are expected to reach their closest proximity
True
false
The Time of Closest Point of Approach (TCPA) represents the time remaining until two vessels reach the closest point of approach, allowing mariners to take timely action.
true
false
The Bow Crossing Range (BCR) describes the angle at which a vessel's bow will cross the path of another vessel.
True
false
The Bow Crossing Time (BCT) indicates the time remaining until a vessel's bow crosses the path of another vessel, helping mariners plan collision avoidance actions
true
false
Automatic Tracking ARPA
This ARPA type digitally processes radar unwanted echoes to provide target information.
true
false
The IMO Performance Standards for ARPA address the requirements for this aspect of the system
(a)
A crucial ARPA limitation stemming from the inherent inaccuracies of the radar sensor itself
Performance Standards
-The SOLAS Convention mandates that this type of ARPA must be fitted on certain vessels
(a)
An example of this is failing to cross-check ARPA data with visual bearings or other navigational tools
(a)
Initiates the process of an ARPA acquiring a radar target for tracking.
(a)
Displays the predicted future movement of a tracked target, indicating its course and speed.
(a)
-Simulates a proposed maneuver (e.g., course alteration, speed change) to predict its effect on target CPA.
(a)
-Automatically alerts the operator if a target enters a pre-defined area around the vessel.
(a)
The process by which the ARPA system continuously monitors and updates the position, course, and speed of a selected target.
(a)
The shortest distance that an approaching vessel will come to your own vessel.Its the minimum range between the two vessels during their encounter.
(a)
The true bearing from your own vessel to the other
vessel when it reaches its Closest Point of Approach (CPA).
(a)
The amount of time remaining until the approaching vessel reaches its Closest Point of Approach (CPA) to your own vessel. It indicates how long until the
minimum range occurs.
(a)
The distance at which an approaching vessel will cross ahead of your
own vessel and bow. This is only applicable if the other vessel is projected to pass ahead of you.
(a)
The amount of time remaining until an approaching vessel crosses ahead of your own vessel and bow. This is only applicable if the other vessel is projected to pass ahead of you
(a)
what is the frequency of X-Band Radar
(a)
What is the Wavelength of S band Radar
(a)
What is the Frequency of s band radar
(a)
What is the Wavelength of x band Radar
(a)
What is the Detection Range of x band radar
(a)
what is the Detection Range of S band Radar
(a)
what is the Resolution/detections of s band Radar
(a)
