That's using the old noodle.

[Stillski]

I love noodles, I can't go in a store without checking for various ID/OD sizes I might not have in stock. Here are some uses I found for the boat. No puddle cover support, board rack slot shim so the surf board fits better and I can store the kneeboard on top, stadium seating back supports storage and my homemade tube harness. They're even great for floating in the lake!