Lieutenant Junior Grade
US Navy Lieutenant Stephen Decatur
In the US Navy that rank is called Lieutenant jg. "Junior Grade"
Lieutenant in the Navy is not O4 - O4 is Lieutenant Commander. See the related link for a basic pay chart for commissioned officers.
No, US Navy Lieutenant Stephen Decatur led the raid.
An O-5 in the navy is a Commander
Depending on his or her time in service a Navy Lieutenant (O3) makes anywhere from $3,540 to $5,760 per month in base pay.
lieutenant 
Lieutenant
Yes, in all branches of service. The Navy uses a different structure for officers than the Air Force, Army, and Marines. In the Navy, a Captain is O6, equivalent to a Colonel in the remaining branches. A Navy Lieutenant is O3, equivalent to Captain in the other branches, and a Navy Lieutenant Junior Grade is O2, equivalent to a First Lieutenant in the other branches.
It depends on the branch of service.Branch: Rank/GradeUSAF: 1st Lt/0-2USA: 1LT/0-2USMC: 1st Lt/0-2USN: Lieutenant Junior Grade (LTJG)/0-2USCG: Lieutenant Junior Grade (LTJG)/0-2Note: Navy and US Coast Guard officer ranks differ from other branches.
It depends on what kind of lieutenant you're talking about. If you're talking about a lieutenant in the navy, then it's taii. If it's a lieutenant in the army, then it's chuui.If it's a lieutenant in the police, it's keibuho.That's all the lieutenant words I can think of. Hoped that helped x
Prince William holds the rank of Captain in the Blues and Royals, Lieutenant in the Royal Navy and Flight Lieutenant in the Royal Air Force.