Question

question 1
q1. why is multibeam sonar superior to single-beam echo sounding for seafloor mapping?

○ it penetrates deeper into the seafloor layers

○ it covers a wide swath of seafloor in one pass

○ it measures gravity anomalies from the ocean surface

Explanation:

• Analyze each option:
• Option 1: Multibeam sonar is not mainly for deep seafloor layer penetration (that's more for seismic methods).
• Option 2: Multibeam sonar emits multiple beams, so it can cover a wide area (swath) of the seafloor in one pass, unlike single - beam which covers a narrow strip.
• Option 3: Measuring gravity anomalies from the ocean surface is not what multibeam sonar does (gravity measurements are different techniques).

Answer:

B. It covers a wide swath of seafloor in one pass