Chase Defense is Underwater Technology Centers’ U.S. distributor and training center

UDI-28 Wrist Unit

UDI-28 is an outstanding, technology proven device, supported by state of the art algorithms, designed to fulfill the professional’s needs.

It offers a new software package, supporting a large number of users and messages. The UDI-28 also provides extended range, depth, endurance and a more robust error correction code, along with a new computer-based boat unit and a new active antenna.

The UDI-28 system consists of the UDI-28 diver’s wrist-worn unit and a the UDI-28 boat (surface) unit. It incorporates digital acoustic messaging technology with SOS and homing capabilities and a 3D compass.

The UDI-28 compact wrist-worn unit is an underwater communication and safety device. This wrist unit connects the diver with the surface vessel upon which the boat unit is located, as well as with fellow divers.

UDI-28W Boat

The UDI-28 Boat Unit is used for text message communication with the underwater divers. Its homing capabilities allow divers to navigate their way back to the boat.
Naval command and control features as well as in-water surveillance capabilities provide additional diver protection and safety layers.


The UDI-28 is an affordable solution – far less costly than other wireless communications available. In terms of price, usage and without the need to waste air consumption due to the increased volume of the full face masks required to accommodate communications, UDI-28 is the right choice.

UDI-28W Boat unit with Sonar

Scan up to 28 divers that use U-28 Wrist unit, optional sonar connection and Optional connection to C2

The most sophisticated product for complete monitoring and communications for offence / defense missions.
Based on two spiral antennas and one active antenna.

Please contact us for additional information.