Let's say a cargo ship uses a large amount of fuel while on a voyage. Could you direct the exhaust i.e. Carbon dioxide into a chamber utilising a check valve so the emissions don't backflow into the engine? Allow the gas to travel through a hose towards the front of the ship and release through a gas control valve which regulated that the gas is at a specific pressure. Before releasing it so that it blocked the wind and cleared the ship essentially eliminating or reducing frontal drag?
Could this method also be utilised on planes and other vehicles? the gas wouldn't weigh much due to heat from just being emitted from an engine so I can't figure out why this isn't used in formula one cars and so forth?