Imperial Fighter said:

Note: Is it really the 'Avenger' that is the most foremost Stardestroyer here? The foremost one (seen in this shot) is the one that gets disabled isn't it? The 'Avenger' is another one that eventually chases after the Millennium Falcon, isn't it?

I believe it is the Avenger, being that it is Captain Needa that is saying: "Good, our first catch of the day". Man, what did Lucas have against poor Captain Needa? First, he gets hit right in the face with an ion cannon blast (imagine him looking out the front window when that second blast hits the bridge square on), then he almost WRECKS a Star Destroyer trying to get the MF, and then he loses a head-on confrontation with a ship as big as the SD's nose (as in "tip of").

And to top off his illustrious career of losing, he gets dragged off the Executor bridge (and no doubt dumped out an airlock) after Vader force-chokes him to death for simply being himself.

And to think: he could have been a moisture farmer on Tatooine and lived a much more peaceful life... well, unless he had some droids the empire wanted...

Hello,

Cabbel: "Sir, Rebel ships are coming into our sector."

Captain Lennox: "Good. Our first catch of the day."

It is not Captain Needa that utter the following line: "Good, our first catch of the day"

It is in fact: Captain Xamuel Lennox and his Star Destoyer is called The Tyrant.

Captain Lennox was portrayed by the actor: John Dicks, but credited as: Imperial Officer.

The other person you see coming in on the left side informing him about the rebels is: Lieutenant Cabbel, he served as first officer aboard the Tyrant.

Cabbel was portrayed by Oliver Maguire.