The Tool Deployment Unit (TDU) is used where subsea equipment has been designed around this ISO interface. It has the advantage of giving a high degree of precision when deploying tools.
The unit conforms to the ISO interface requirements with the full range of supporting tools, including torque tool, gripper, stab plate and linear override tools.
The system is fitted to a host ROV, usually at rear, and is controlled over its own data link from a laptop computer. The operating software includes the Forum torque tool control suite with full turns and torque feedback as standard.