Michael was not in a rush to meet Welton. He was patiently looking at all the nooks and crannies in the ship. The ship seemed to be armed with 42 twelve-pound cannons: 24 on the gun deck and 18 on the upper deck.
At the moment, there were only holes in the place where the cannons should have been. Obviously, the pirates ripped her apart for parts and only kept the ship for some sentimental value or something.
Gibson was too focused on the brand new ship. He was almost certain that they were going to buy this ship. Hence, he didn't notice Michael studying the old ship without even giving a look at the brand new ship.