Abstract: This invention bode is to confine potential oil spills while transfer in, between a ship and a wharf, or between two ships. It is made of a barrier that is fitted on a IS beam fixed on the wharf on which the barrier can be moved vertically with a float, according to the waterline. This barrier is mobile and detachable, of a mechanical. pneumatic or hydraulic type, and can be easily operated by one man. A waterproof canvas is placed on the mechanical barrier to confine the oil slick; a spring thrusts a shoe against the hull of the ship and is kept in place by magnets. A mechanical arm slides against the hull, with the help of balls. A hydraulic alternative stops oil diffusion by creating a current. A pneumatic alternative uses a curtain of bubbles that burst at the surface and hold the oil while creating a current.