What does SONAR stand for?

What does SONAR stand for?

• A. sound navigation and ranging
• B. sonic navigation and reporting
• C. sound neglect and radiography
• D. sonar navigation and radar

Answer: (A)

The idea being tested is knowing what the acronym SONAR expands to. SONAR stands for sound navigation and ranging. Here, "sound" refers to the acoustic signals used underwater, "navigation" means determining position or course, and "ranging" means measuring the distance to objects by timing how long the sound takes to travel to and from them. This combination describes how sonar is used to detect underwater objects and map surroundings. Other options change key terms: using "sonic" instead of "sound" is not the standard expansion, "reporting" doesn’t convey distance measurement, "radiography" relates to X-ray imaging, and mixing with "radar" would involve electromagnetic waves instead of sound.

The idea being tested is knowing what the acronym SONAR expands to. SONAR stands for sound navigation and ranging. Here, "sound" refers to the acoustic signals used underwater, "navigation" means determining position or course, and "ranging" means measuring the distance to objects by timing how long the sound takes to travel to and from them. This combination describes how sonar is used to detect underwater objects and map surroundings.

Other options change key terms: using "sonic" instead of "sound" is not the standard expansion, "reporting" doesn’t convey distance measurement, "radiography" relates to X-ray imaging, and mixing with "radar" would involve electromagnetic waves instead of sound.