Lt.Overload
Rear Admiral
Although it happens in Wing Commander occasionally, just sticking a number on the end of a name isn't very creative. It can make sense if you have the proper justification, otherwise a better option is come up with a similar name that's related in some way.
I know it isn't creative, but it has that Wing Commander feel to it. Not to mention it looks alot like the Stingray.
Maybe Bass?
Or Bat Ray.
Maybe Eel?