This is part of a story I am currently writing it explains a new rank system that had to be developed for a unique situation
Sentinel Ranks
White for Probation
Orange for Entry
Purple for Freshman
Red for Sophomore
Black with silver outlines for First Junior
Green for Second Junior
Blue for High Junior
Gold for Senior
Rank Equivalents
Probation is Academy student
Entry is Ensign
Freshman is Lt. junior grade
Sophomore is Lt.
First Junior is Lt. Commander
Second Junior is Commander
High Junior is Captain
Senior is Admiral