Computer · Surveying
An instrument is set up and a back sight is taken to a permanent object A. A staff reading is taken at point 1, and then a fore sight is taken. The next point is not visible, so the instrument is shifted to point 2. What reading should be taken first after setting up at point 2 on the change point?
- 1Fore bearing
- 2Back bearing
- 3Fore sight
- 4Back sight✓
Correct answer
Back sight
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