<P> The ranks of junior officers are the three or four lowest ranks of officers . Units under their command are generally not expected to operate independently for any significant length of time . Company grade officers also fill staff roles in some units . In some militaries, however, a captain may act as the permanent commanding officer of an independent company - sized army unit, for example a signal or field engineer squadron, or a field artillery battery . </P> <P> Typical army company officer ranks include captain and various grades of lieutenant . Typical naval and coast guard junior officer ranks include grades of lieutenant commander, lieutenant, lieutenant junior grade, sub-lieutenant and ensign . Commonwealth (excluding Canada) air force junior officer ranks usually include flight lieutenant, flying officer, and pilot officer . </P> <P> "The (U.S.) commissioned officer corps is divided into 10 pay grades (O - 1 through O - 10). Officers in pay grades O - 1 through O - 3 are considered company grade officers . In the Army, Marine Corps, and Air Force, these pay grades correspond to the ranks of second lieutenant (O - 1), first lieutenant (O - 2), and captain (O - 3), and in the Navy, ensign, lieutenant junior grade, and lieutenant . Officers in the next three pay grades (O - 4 through O - 6) are considered field grade officers . In the Army, Marine Corps, and Air Force, these pay grades correspond to the ranks of major (O - 4), lieutenant colonel (O - 5), and colonel (O - 6), and in the Navy, lieutenant commander, commander, and captain . The highest four pay grades are reserved for general officers in the Army, Marine Corps, and Air Force, and flag officers in the Navy . The ranks associated with each pay grade are as follows: in the Army, Marine Corps, and Air Force, brigadier general (O - 7), major general (O - 8), lieutenant general (O - 9), and general (O - 10); in the Navy, rear admiral - lower half, rear admiral - upper half, vice admiral, and admiral ." </P> <P> Officers in training in the Canadian Armed Forces are either naval cadet for naval training or officer cadet for army or air force training . </P>

What rank is higher than captain in the army