Question

In this SONAR, ripple beams are formed to search the $360^{\circ}$ arc around the platform.

• A. Step search
• B. Bottom bounce
• C. Convergence zone
• D. Panoramic

Hint:

The word Panoramic literally means an unbroken view of the whole region surrounding an observer. In sonar terms, this translates directly to a $360^{\circ}$ acoustic search.

Answer 1

The Correct Option is D

Step 1: Understanding SONAR Technology:
SONAR (Sound Navigation and Ranging) uses acoustic waves to detect submerged objects (like submarines or mines). Different sonar transmission modes are used depending on the tactical requirement and the search pattern needed.

Step 2: Analyzing the Search Patterns:

• Step Search (A): The sonar beam is transmitted in specific, discrete steps or narrow sectors rather than a continuous wide circle.
• Bottom Bounce (B) & Convergence Zone (C): These are acoustic propagation paths (how sound travels through different ocean layers and bounces off the seabed or thermoclines) used for long-range detection, not specific $360^{\circ}$ scanning methods.
• Panoramic (D): In a panoramic sonar system, an omnidirectional transmission is sent out, or multiple receiver beams (ripple beams) are formed simultaneously to cover a complete $360^{\circ}$ arc around the ship, providing a "panorama" of the underwater environment.

Step 3: Conclusion:
Since a $360^{\circ}$ continuous or ripple-beam search corresponds to a panoramic view, option (D) is correct.