Abstract

ABSTRACTRecently enacted public law and international treaties prohibit the discharge of oily wastes from oceangoing ships. To comply with these laws, the U.S. Navy and the Department of Defense (DOD) have issued a directive implementing standards for the prevention of oil pollution from U.S. Navy ships.Because of unique equipment and system design requirements for combatant and auxiliary ships in the U.S. Navy, research and development (R&D) was initiated to develop oil/water separator (OWS) systems. Over the past ten years, three systems were developed that met the Navy's requirements and are currently installed aboard Navy ships.Recently, a new generation of oil/water separator was conceived. Using existing oil coalescing theory and equipment already in the fleet, an in‐tank oil/water separator (ITOWS) was developed. This new separator, installed aboard a naval combatant for testing, has met or exceeded all system requirements. Following a satisfactory operational evaluation by an independent U.S. Navy test command, the ITOWS will be specified for installation aboard new U.S. Navy ships.This article reviews current U.S. Navy OWS designs and introduces the ITOWS system currently undergoing final evaluation.

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