Computer · Surveying
What is the primary function of the 'sight vane' in a surveyor's or prismatic compass?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1To balance the weight of the magnetic compass needle
- 2To amplify and measure microscopic vertical angles
- 3To provide a direct structural reference for setting local declination
- 4To align the line of sight of the compass with the target object during bearing measurement✓
Correct answer
To align the line of sight of the compass with the target object during bearing measurement
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