http://www.marines.mil/Portals/59/Pu...%201650.1H.pdf Hey everyone. I've been reading a few "awards" threads and noticed that most people are referring to the Marine Corps Order (MCO 1650.1) while that's all well and good, I wanted to let everyone know that Headquarters, Marine Corps uses the Secretary of the Navy Instruction (SecNavInst). There are a few things that the MCO touches on that the SecNav does not (i.e. Meritorious Masts and those sorts). But, for Navy and Marine Corps Achievement Medals and up, the SecNav will trump the MCO. Once again I wanted to throw the knowledge out there because I know that many... MANY Marines, fresh and salty don't about the SecNavInst 1650.1H. Have a good day.