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The instrument used by a submarine crew to view objects on the water surface is the __________________?

A) Telescope
B) Sonar
C) Periscope
D) Radar

Correct Answer: C) Periscope

Reason: A Periscope uses a system of mirrors and lenses to allow observation from a concealed position.
Related One-Liners:
1) The viewing ability is achieved using mirrors or prisms.
2) Sonar is used for detecting objects underwater.
3) Measures the speed of a vehicle. Speedometer.
4) Measures the altitude. Altimeter.

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