I know I'm just a "Bubblehead" and they say we're in the upper <10% of the USN because the "Boats" have things that go roundy roundy and up and downy (So I slipped through the cracks!)
...anyway as I'm very tired I hope this answers your question on pg.3 of this ref bottom.
http://www.dtic.mil/ndia/2012armamen...arlesClark.pdf
Have a Great Weekend!
Regards,
Pat