Sweet Tim!
Here's a pic from several years ago. The side flaps are meant to stake to the ground if you were to lay the umbrella on its side. We used them some thinking the wind would want to lift the umbrella out of the boat, but that hasn't been the case the seat post fits tight enough into the base mount.
Chatt \ Bill, if you want to be the coolest person on the water you need one of these tents for your boat like my daughter.
Sweet Tim!
Wow I think Chief would like that