An autonomous cargo transporting system transports the cargo on a body of water using the natural current of the body of water to deliver cargo to a downstream port. The cargo system is asymmetric since cargo is delivered downstream using the current but the cargo system is disassembled (drastically reducing the weight) for a multimodal return trip back up the body of water.

A cover for watercraft, such as pontoon boats, facilitates easy deployment and removal, as well as compact storage. The cover may be collapsed and deployed in a predetermined manner. The cover may include collapsible poles integrated with the cover fabric, which can be extended and retracted as the cover is deployed and collapsed. An arrangement of zippers and tensioners may be used to facilitate deployment securement and removal of the cover, as well as to facilitate access to at least a portion of the covered portion of watercraft while the cover is deployed.