You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5-mile, 1 mile, and 1.5 miles. Which term is given to these unwanted echoes?
• Relative bearing of the unwanted echoes compared to your own ship’s heading • How another vessel close aboard can affect your radar display • Difference between spoking, multiple echoes, side-lobe echoes, and indirect echoes
• Ask yourself: Why are all three unwanted echoes showing at the same relative bearing (090°) but at different ranges? What does that suggest about their origin? • Think about how the strong echo from the ship overtaking on your starboard side might create additional weaker returns on your radar screen. • Consider which of the four terms is specifically associated with false targets that appear at the same bearing as a strong target but at various ranges.
• Verify which phenomenon is linked to a very strong nearby target creating extra echoes along the same bearing. • Eliminate any option that usually appears in a spoke-like pattern from the center of the screen rather than as separate targets at the same bearing. • Check which term describes echoes caused by energy picked up outside the main radar beam, producing false targets near a strong contact.
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