 In order to facilitate integration and partnerships, the MK4 was developed towards the Naval Open Architecture.MK4 employs DDS to create modularity and introduces the Java programming language for certain applications.The first deployment of some limited 9LV MK4 software components were as part of the Lockheed Martin Canada CMS330 Combat System used on the "Halifax"-class frigate where Saab acted as a sub-supplier to Lockheed-Martin Canada.