Lieutenant Commander
4.A commissioned rank in the U.S. Navy or Coast Guard that is above lieutenant junior grade and below lieutenant commander.
5.an officer holding a commissioned rank in the US Navy or Coast Guard; below lieutenant commander and above lieutenant junior grade.
6.A commissioned officer in the British and Canadian navies ranking just below a lieutenant commander.
7.A commissioned rank in the U.S. Navy or Coast Guard that is above lieutenant commander and below captain.

