OPC “Placemat”
Below is a post from the Acquisitions Directorate (CG-9). I had never heard of the “Athena combat weapons system” so “Googled” it. The most common thing that came up was an Army laser weapons program. I don’t really think that is what they talking about, but I could be wrong. The post does call it a “weapons system.” I think it may be the Leonardo ATHENA® (Architecture & Technologies Handling Electronic Naval Applications) Combat Management System (CMS). Leonardo’s web page on the system indicates it is the CMS used on the FREMM frigate which is the parent craft for new USN FFG. Maybe the Navy liked the CMS as much as they liked the ship.
The CMS on the Bertholf class cutters is an Aegis based system. I have not heard anything about its application to the offshore patrol cutter (OPC).
Late Addition: Got this, thanks to Timothy H,
The Coast Guard modified its current contract with Eastern Shipbuilding Group (ESG) May 20 so installation of the Athena combat weapons system and multi-mode radar system will be completed during the production phase of the offshore patrol cutter (OPC). The Athena system, radar and armament of the OPC are provided to the Coast Guard as Navy type-Navy owned government furnished equipment.
Prior to this modification, installation of both systems was to occur after contract delivery while each cutter was in its homeport. The Navy has completed development, integration and testing of the Athena and radar systems, enabling the Coast Guard to shift to production-phase installation. Performing this work prior to delivery reduces the technical risks associated with post-delivery installation and delivers mission-ready OPCs to the fleet as soon as possible.
The first four OPCs are currently in production at ESG’’s shipyard in Panama City, Florida.
The OPC meets the service’s need for cutters capable of deploying independently or as part of a larger task force and is essential to stopping smugglers at sea, rescuing mariners, enforcing fisheries laws, responding to disasters, interdicting undocumented individuals and protecting the nation. The acquisition of 25 OPCs will complement the capabilities of the service’s national security cutters and fast response cutters as an essential element of the Department of Homeland Security’s layered maritime security strategy.
For more information: Offshore Patrol Cutter Program page
Chuck Hill's CG Blog 
Yes it is good news to have electronics systems under contract, BUT … installing those into the OPC will probably be a big challenge for the shipyard. That work many or may not be part of the yard effort?