
Product details: ESP Mk3 Rangefinder | ESP Ltd. | EDM | Survey | Material: Plastic
These instruments were used on the Rijkswaterstaat surveying vessels to measure the distance from the vessel to the shore. In 1997 these instruments were still in use along the rivers as a means of positioning the vessel at an exact distance from the shore rather than the more in accurate DGPS systems then around. Used these myself on the Speurder in those days.