Complex sentence: The engine room with the appearance of large wood box, is located inboard in the center line of the boat before the seating area, which is two on the left and another two on the right and an aisle passing in the middle.
Split into simpler sentences: The engine room, in the appearance of a large wooden box, is located inboard in the center line of the boat in front of the seating area. There are two rows of seats on the left and another two on the right and an aisle passing in the middle.