After the lock opened MacDonald saw a staircase leading him deeper into the sub.
This sub did look completely different on the inside from the pristine condition on the outside. At least it did not stink of death or decay.
Then he arrived at the cockpit...."Look at those seats....this thing must have been here for ages."
MacDonald sat behind the steering wheel and tried to get the sub started.
He tried all the levers and buttons, but nothing seemed to work.
"C'mon, I have to get out of here...." So he punched on the small screen in front of him, and suddenly the sub shivered and the engines started to run.
"Yes, that's it, baby....come to mama...."
MacDonald grabbed the steering wheel and steered the sub slowly out of the underwater cave, taking care that he was not hitting anything.
"Now let's see how deep you can go..." So MacDonald grabbed the steering wheel and pushed it away from him, and the sub started diving, deep into the darkness, where only octopuses where witness of his presence.