Which of the following is/are incorrect statement(s)?
1
If the whole circle bearing of a line is 270° , its reduced bearing is N 90° W
2
Back Bearing of a line is equal to Fore Bearing ± 90°.
3
In the case of fixed hair stadia tachometry, the staff intercept will be larger, when the staff is held nearer to the observation point.
4
The boundary of water of a calm water pond will represent contour line.