Chekov catches it easily. Understanding dawns on his face. They're being monitored. He'll have to do a more thorough sweep of his room later.

"Thank you, sir. I will look for supplies as soon as I can."

To a lot of people, it would look like Chekov took it as an order. He didn't-- the people who know him know that he's simply already in problem-solving mode mixed with his natural politeness to the Captain.

He sits on one of the chairs, indicating that he's ready to listen if Kirk is ready to talk.