Hiding your sat nav is no good if you leave the telltale sign of suction marks on the windscreen.
Police are warning motorists to take extra precautions after a break-in in Shakespeare Avenue, Grantham. Officers believe thieves targeted the van because of the marks left on the glass.
Although the sat nav was hidden away and not stolen, building equipment was taken from the back of the van.
Anyone with information is asked to call police on the non-emergency 101 number.