<Li> The Chief of Naval Operations serves for four years in one four - year term . </Li> <Li> The Vice Chief of Naval Operations serves for a nominal four years, but is commonly reassigned after one or two years . </Li> <Li> The Director of Naval Nuclear Propulsion serves for a nominal eight years . </Li> <Li> The Commandant of the Coast Guard serves for a nominal four years . </Li>

How many admirals are in the u.s. navy