Abstract: A system for oil and water separation by siphon and vacuum means, upon an oil tanker vessel; the system including in one design a relatively small, sealed tank upon a deck of the vessel, a hand controlled vent valve on a top of the tank, an outlet end of a siphon line entering the tank while an inlet end of the siphon line may run into a collection or other tank, and discharge lines from lower and upper ends of the sealed tank being connected to pumps for discharging oil at a top and water at the bottom.

Abstract: A system installed within a tanker vessel for collecting all residue oil within a single tank of the vessel so that ballast water within other tanks can be readily discharged into the sea, without oil pollution thereof, prior to refilling with oil; the system consisting of a floating oil collector in ach tank that collects all oil above a water surface therewithin, the collected oil being transported through a pipe to the single collection tank; and the vessel already incorporating systems for pumping sea water into the tanks to serve as ballast, and for pumping the ballast water back into the sea thereafter.