This Recommended Practice provides guidance for use in specifying and implementing the OPC Unified Architecture (UA) for use as a standard communication interface for use between a Distributed Control System (DCS) and a Subsea Production Control System (SPCS) for control of subsea equipment.

Guidance for specifying minimum requirements when implementing MDIS are provided to ensure:

• Equipment compatibility when integrating the MCS or Subsea Gateway with the DCS.
• Safe and effective operation of equipment controlled by the MCS or Subsea Gateway from the DCS. Successful integration of the DCS with the MCS or Subsea Gateway during project execution.