Aquaculture Engineering

Instruments used for setting out right angles - Setting out right angle

Unit 1- Surveying

Chain surveying

Instruments used for setting out right angles

Setting out right angle by using cross staff
The cross staff is set up at a point on the line from which the right angle is to run, and then turned until one line of sight passes through the ranging rod at the end of the survey line. The line of sight through the other two vanes will be a line at right angles to survey line and a ranging rod may be established in that direction.