How does the dual memory function reduce sea...

How does the dual memory function reduce sea...

Question 1 of 27070tPej7RMZSZzogepYKhiW

How does the dual memory function reduce sea clutter?

Question 1 of 27070

Q

How does the dual memory function reduce sea clutter?

🔍 Key Concepts

• Sea clutter on marine radar (what causes it and how it looks on the PPI screen) • How a dual memory (or scan-to-scan) processing system treats returns that appear on more than one sweep • Difference between changing receiver gain/sea clutter controls vs. using electronic processing/comparison between sweeps

💭 Think About

• Ask yourself: Does sea clutter usually stay the same from sweep to sweep, or does it change rapidly? How about real targets like ships and buoys? • Which choice describes a process that would tend to ignore short‑lived, random echoes while keeping persistent echoes? • Do dual memory systems physically change target size or receiver gain, or do they mostly work by comparing information from multiple scans?

✅ Before You Answer

• Identify which option involves comparing successive radar sweeps rather than just changing gain. • Eliminate any option that talks about simply making targets bigger without addressing clutter discrimination. • Check which choice talks about receiver gain; ask whether dual memory is a gain control or a signal processing/comparison function.