How do you use laser level for ditch digging?

To use a laser level for ditch digging, first set up the laser level on a tripod at a designated point, ensuring it is level. Next, project the laser beam across the area where the ditch will be dug, marking the beam's height at various points along the intended path. Use these marks as a reference to maintain a consistent depth and slope while digging the ditch. Regularly check the depth against the laser line to ensure accuracy throughout the excavation process.