Actually, his letter of commitment (as I understand it) specified a term of service of 6 years, from 1968-1974. It didin't specify any amount of "time served." In any case, he was honorably discharged, and that has to be good enough......this isn't about the particulars of his military career, but about propaganda, and, indirectly, whether or not his fly-in to the USS Lincoln can or should be construed as such. It was, IMHO, clearly a photo-op moment: he could have used a helicopter, or waited for the ship to dock-it was a mere 30 miles off shore at the time of his landing.
The problem I have with your position Elder is that you have yet to convey what meaning this photo opportunity is supposed to express. I do not believe that every photo op is propaganda. Certainly it is meant to make the person look good, but what is it trying to say.
As I have expressed before, IMO, propaganda is a set of select truths, to the exclusion of contrary truths, to support a supposition. As no one has offered another definition, thats the one I will stay with. What is this photo saying, and then what do you thing the meaning of what it is saying is.