STÜWE & CO. SCHIFFAHRTS GMBH.
image by Jorge Candeias, 12 March 1999
The flag is white with narrow dark-blue stripes along the upper and lower edges and a central lozenge-based logo. A light-blue square diamond is accompanied by triangles coloured dark blue, white, dark blue and light blue across the upper row, reversed below. Interconnected S and L are respectively dark blue and white. The monochrome drawing labelled as a funnel may instead represent a superstructure panel; it shows only S.