Seven or so years ago a non-profit group known as The Ocean Cleanup launched System 001 (aka Wilson) into the Pacific Ocean to begin cleanup on the Great Pacific Garbage Patch, a high-concentration 'soup' of plastic between Hawaii and the Western Coast of the United States.
Initial results were - by their own description - promising, though they did have some "unscheduled learning opportunities" leading to the creation of System 001/B then on to System 002 (aka Jenny).