A submarine is designed for combating oil when submerged. The submarine includes a snout (14, 36) which is conduit-connected to a conduit leading into the submarine. The snout (14, 36) is part of an oil suction device and/or part of a device for bringing out an oil decomposition substance. The snout (14) may be designed in a rigid manner and be pivotable from a position between a pressure hull (6) of the submarine and an outer hull (10) forming an upper deck (12) of the submarine, into a position outside the outer hull (10). The snout (36) may also be designed in a flexible manner, wherein the snout (36) is fastened in a section adjacent to a free end, on an ROV (40).