Castor Engineering and 
OceanTec Design
High pressure hydraulic and pneumatic control valves with zero leakage. Pressures to 20,000psi. Extremely fast acting, low power requirement solenoid valves. Penetrator for cathodic protection. Integrated Tilt, Heading, Depth Sensor for remote operation in ocean environments.
Planning Systems, Inc.
PSI has special expertise in battery operated (low power), pressure tolerant, extreme temperature, and rugged electronics. In addition, PSI has become an industry leader in high density underwater miniature electronics systems. Products include the Integrated Tilt, Heading, Depth Sensor for remote operation in ocean environment, the Pentad Hydrophone, and the Slim-Line ATM-SONET Node for sensor network telemetry in space-constrained applications.
SeaCon Brantner
SEACON underwater electrical connectors and cable assemblies: MiniCon, All Wet and FAWL underwater mateable connectors,Metal Shell, and reinforced epoxy connectors and hull penetrators. High Pressure and High Temperature Glass Sealed Connectors; Fiber Optic Connectors. CM2000 underwater fluid filled electrical connectors and HydraStar underwater mateable fiber optic connectors, in conjunction with Lockheed Martin.
SeaCon Phoenix
Glass to metal seal connectors, feed thrus, MIL-SPEC connectors for high pressure, high temperature for harsh environments, such as undersea, downhole, nuclear, and aerospace applications.
General Oceanics
Water Samplers, Flow Meters, Data Loggers, Current Meters, Plankton Nets.
