The following is the data sheet from a levelling book. The INCORRECT option is
| Station | BS | IS | FS | RL | Remark |
| Q | -3.45 | 150 | BM | ||
| R | 2.60 | ||||
| S | 1.60 | 2.25 | CP | ||
| T | 1.85 | ||||
| U | 2.15 | 1.70 | CP | ||
| V | -2.35 |
BS = Back Sight, H = Height of instrument, IS = Intermediate Sight, FS = Fore Sight, RL = Reduced Level, BM = Bench Mark and CP = Change Point)
(All figures are in metre.)
1
RL of Station U is 142.35 m
2
HI at Station T is 145.90 m
3
RL of Station S is 144.30 m
4
HI at Station R is 146.55 m
5
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