Radar Navigation Quiz 3 final 10267

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.