Core Avionics Master Plan - NAVAIR - U.S. Navy

Core Avionics Master Plan 2011 Appendix A-22. Funded Enhancements and Potential Pursuits.First Responders Interoperability (APCO-25). (2015) APCO-25 was establishedto address the need for common digital public safety radio communications standardsfor First Responders and Homeland Security/Emergency Response professionals.APCO-25 compliant technology is being deployed in several phases. Phase 1 APCO-25compliant systems are backward compatible and interoperable with legacy systems,across system boundaries and regardless of system infrastructure. Phase 2 is currentlyunder development with the goal of improved spectrum utilization, with focus oninteroperability with legacy equipment, interfacing between repeaters and othersubsystems, roaming capacity and spectral efficiency/channel re-use. Phase 3 willaddress the need for high-speed data for public-safety use. Activities will encompassthe operation and functionality of a new aeronautical and terrestrial wireless digitalwideband/broadband public safety radio standard that can be used to transmit andreceive voice, video and high-speed data in wide area, multiple-agency networks.C. Digitally Aided Close Air Support (DaCAS) / VMF. CNR/VMF standardsenable DaCAS (exchanging digital data vs. voice communications to execute CAS).Due to the development of non-interoperable standards by each Service for exchangeof digital data the Office of the Secretary of Defense (OSD) directed the Services todevelop a common interoperable method for exchanging digital data over tactical radiosystems. Services established the CNR Working Group (CNRWG) to develop andcontrol a set of standards. CNR standards enable a small number of users to exchangedigital VMF data over LOS radios. They are used extensively by US Army and USMCground forces and in Naval Aviation to support CAS missions. The CNR networkprotocol stack consists of a physical layer, VHF/UHF LOS communications (includingSINGCARS and HQ), a link layer protocol MIL-STD-188-220 (Digital Message TransferDevice Subsystems), a MIL-STD-2045-47001 (Connectionless Data Transfer)application layer header, and the MIL-STD-6017 VMF message standard application.1. Current capabilities.In order to communicate data via bit level standards, all platforms must implementthe same revision levels. Since revisions can occur every 18 months, it is has beendifficult to achieve interoperability amongst ground equipment and air platforms. For thisreason, and the fact that some platforms are yet to implement the standards, CASmissions are conducted primarily via voice comms today.2. Advance Research and Technology Development.VMF Revision E and F. (2013-2015, 2015-2017) WMF Rev E is being developedand F is planned. Each will add new capabilities or improvements to VMF Rev D Chg 1.3. Funded Enhancements and Potential Pursuits.VMF Revision D Change 1. (2013) To address the current interoperabilityproblems, the community has agreed to make all of the CNR standards beginning withthe “D” version backward compatible. The “D” version of the standards is: MIL-STD-188-220D, MIL-STD-2045-47001D and MIL-STD-6017A. In response to problems JointStrike Fighter (JSF) encountered during their implementation attempts, the CNRWorking Group updated the standards to MIL-STD-188-220D Chg 1 and MIL-STD-2045-47001D. Platforms planning on conducting digital CAS missions must implementthese standards.A-2 Information Exchange 6