Never worked with either. As far as I know the 72 field has air traffic controllers and stuff like that. I can ask around tomorrow, we have Marines of all makes and models at this course. I will see what I can find out for you.

Our MOS is defined by four numbers. Mine is 4341. The first two numbers define the field. 43 in mine means I am in the public affairs field. The last two numbers define the specialty within that field. The 41 in mine means I am in the combat correspondent (photojournalist) specialty. There is also a 13 or broadcast journalist specialty in my field.

That said, which specialty in the 72 field in the Marine Corps are you talking about. If you follow that link I post and click on the field you are interested in, you can find out more about each specialty by clicking on the ones in the list.