Sub-Lieutenant

Sub-Lieutenant was a military rank.

In Imperial Service
A Sub-Lieutenant, or Lieutenant Junior Grade, as it had been known until a reform in 15 ABY, was an Imperial Navy rank immediately above Ensign and below Lieutenant.

Ensigns were promoted to Sub-Lieutenant upon receiving certain command training and has proved their worth to their commanding officer through successfully managing given tasks and assignments. Sub-Lieutenants generally did not receive any command authority in the Navy, and was instead used for organizational means. Their only real authority was over Ensigns and non-commissioned officers, and instead just paved a way towards Lieutenant.