Aluminum workboat RIB with modular tubes.

Looks like a big gap and the tubes aren't connected to planing hull directly.

Looks like their might be danger of pinching tubes between sharp edge of hull and another hard object, especially if wave action jacks the boat up while the tube is pressed up against an immovable object.

I guess some seawater would flood into the triangular tunnels between the hull and tubes at rest to ballast the boat at rest since the hull doesn't have a typical RIB ballasting hull.