The HV602's PlaneLok capability involves using the receiver in conjunction with radio to fix and lock the laser beam in one axis, even if the beam is not level. This feature eliminates problems associated with temperature drift with long range vertical applications. PlaneLok also provides an easy solution to difficult setup locations such as ships or high rises that are moving in the wind. Using PlaneLok, the laser beam can be locked to a reference on the actual structure.
After placing the laser in manual mode, PlaneLok can be used to lock the laser plane to a slope, allowing straightforward slope grading.