Israel’s DSIT Solutions Ltd., has received a $4.4 million contract from an undisclosed U.S. customer for its AquaShield underwater diver detection systems to provide protection of several coastal and offshore installations. The order is one of the largest ever for DSIT, which is a subsidiary of Acorn Energy, Inc. [ACFN]. The sonar-based AquaShield locates swimmer delivery vehicles, swimmers and divers automatically at ranges up to 1,500 meters. The company has also received $2 million in additional orders the past two months from return customers in Israel and elsewhere. AquaShield is designed to provide maritime security for ports, power plants, oil and gas terminals and offshore rigs.