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.

These checklists and associated text maybe used directly in an RFQ, or maybe adjusted as needed.