The german destroyer Z12 Erich Giese, sunk in the battle of Narvik, Norway, 1940 is now leaking fuel. The propulsion system included Wagner geared turbines, and was probably fueled by naphtha from the german Fischer-Tropsch process. The observed fuel on the sea surface has a red/pink color, which is water-soluble. Does anyone know what causes this color - an additive or a dye?
Any information of this is highly appreciated!