OPNAV means Office of the Chief of NAVal OPerations in Military
Similar to OPNAV
12N - Horizontal Construction Engineer13 SCVI - 13th South Carolina Volunteer Infantry Regiment
13AD - 13th Airborne Division
13B - Military Occupational Specialty code for Cannon Artilleryman
147FA - 147th Field Artillery Regiment
15MG - 15 Militia Group
17AD - 17th Airborne Division
View all in Military