This procurement is for a total of 13 Digital I/O Circuit Card Assemblies (CCAs) in support of PMS 392 (In-Service Strategic/Attack Submarines) modernization efforts. These specific components are uti... This procurement is for a total of 13 Digital I/O Circuit Card Assemblies (CCAs) in support of PMS 392 (In-Service Strategic/Attack Submarines) modernization efforts. These specific components are utilized on Ohio and Los Angeles (LA) class submarines and are being procured to mitigate an impending obsolescence issue.