Yes its huge. At first I thought Barnum and Baily Big Top Circus Tent. But to accomplish the full enclosure thats what it is. The fabric is Subbrella in a green or teal color. We were going to do the traditional blue, but everyone has that. I had a red top on the last boat and it would radiate heat from the dark color, so we went with a lighter shade. There will be windows on all panels for visability. 3 panels on each side and 2 on the back. Yes its alittle higher than the roof, I think at 76 inches. The straps you see are for mock up. The only straps will be at the rear. As I see it, the issue with boarding, you will have to duck alittle when entering from a dock, if the top is deployed.