"This document supersedes COMSCINST 3070.1 and was issued to update the Operations Security (OPSEC) plan for Military Sealift Command (MSC) in accordance with references (a) and (b). This instruction is a complete revision and should be read in its entirety. The provisions of this instruction apply to the MSC organization, world wide, including ships of the MSC Force. To ensure integrity of operations, Naval Fleet Auxiliary Force (NFAF), Special Mission ships, Prepositioned ships and Strategic Sealift ships while under the operational control of other commands, will operate under the provisions of that Commander's OPSEC Plan. MSC will conduct an aggressive OPSEC Program designed to improve mission effectiveness through the identification and elimination of potential OPSEC vulnerabilities. OPSEC is not a security function; it is an operations function. The practice of OPSEC prevents the inadvertent compromise of sensitive or classified activities, capabilities or intentions at the tactical, operational and strategic levels. In order to conduct an effective OPSEC Program, all assigned personnel and contractors must understand the concept of OPSEC and apply that knowledge and awareness in their day-to-day performance of assigned tasks. Therefore, it is essential that all military and civilian personnel receive appropriate OPSEC training."
COMSCINST 3070.1A; N3/5