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← ScienceWhich risk increases when a submarine's sonar propagates at shallow thermoclines?
A)Signal blockage behind pressure ridges
B)Increased spherical spreading losses occur
C)Multipath interference degrades target resolution✓
D)Reduced Doppler shift measurements seen
💡 Explanation
Multipath interference increases because sound waves reflect between layers; therefore, target resolution is degraded rather than signal being blocked (which relates to geometric shadowing) or Doppler shift changes (frequency differences are still measurable) related to wave nature; mechanism name: Wave Interference.
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