These coaches know exactly what the lines are and exactly what they are doing. They were going for the cover so all the high ranking naval academy gamblers would win. Most likely got the push with +11.
Week in and week out this forum is littered by threads with dumb calls that coaches make. This crap isn't a coincidence, it's by design!
Every coach knows damn well what the points are and these coaches have to answer to high wagering alumni.
Navy went for 2 to try to cover the spread............that's the only reason!