Answer the following questions.
Full form of SONAR.

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the full form of SONAR.

2. **Recall the Full Form**: SONAR stands for "Sound Navigation and Ranging."

3. **Explain SONAR**: SONAR is a technique that uses sound waves to navigate and detect objects underwater. It operates by sending sound waves into the water and listening for echoes that bounce back from objects.

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