system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] “You are in command now, Admiral Piett.” Are there no ranks betweeen Captain and Admiral, or does Vader just not care?

Title pretty much says it all.

Did Vader have a reason for skipping these ranks, or were there none?
gpt
There aren't ranks between Captain and Admiral (of some type, Rear, vice, lower but Admiral in short form) in most navies. A Navy Captain is much a much higher rank than an Army Captain. A Navy Captain is the equivalent of Colonel. An Army Captain is the equivalent of a Navy Lieutenant.