TESB is unique in that all the imperial officers are wearing perfect rank badges and cylinders. For one who is into these things, its very easy to determine the ranks of for instance Piett, Ozzel or Veers by mearly looking at their rank badges. By comparison ANH's rank system is terribly vague, with officers wearing a confusing mixture of red, blue and yellow. And let's not even talk about the mess in ROTJ, were virtually everyone seems to have the same rank!

There is one officer that is wrong, though, and it seems like a shame when everyone else are perfect. He appears briefly as an extra without lines in Vader's first scene. As Ozzel and Piett are argueing and Vader is making his way over to join them, the camera pans down to the trench and an officer standing looking up at Vader. He is wearing the rank insignia of a navy captain, even though Piett is captain of the ship at that time. However, if another cylinder is added to his other cheast pocket, he becomes a commander instead, which would clear it all up.

I have mentioned this earlier some time ago, so forgive me ady if you've already addressed this, but I wanted to make sure it hadn't been forgotten in the ocean of posts here.