Janak Positioning and Surveying System Pvt. Ltd. Offers Water Proof Handheld GPS Receiver. The Water Proof Handheld GPS Receiver has large display. The Water Proof Handheld GPS Receiver is equipped with rugged constructions. The Water Proof Handheld GPS Receiver is the next generation entry-level GPS. The Water Proof Handheld GPS Receiver floats on water.