Free Water?(FW) 1 : The layer of water that forms when water is present with immiscible liquids, such as oil. The lighter liquid forms a layer above the heavier liquid; e.g. oil usually floats above the free water
Association of Marine Underwriters of San Francisco (AMUSF), Glossary of Marine Insurance and Shipping Terms, http://www.amusf.com/Definitions_A.htm, CA, USA 2011. (Mrtm Insur and Shipping - Amer) {575}