The Koserow shoal lies offshore at a depth of at least 1.75 fathoms. It is about 1 mile N.N.E. of Streckelsberg. Depths of 3.5 to 4.75 fathoms separate the Koserow and Vineta shoals. It is demarcated by a white beacon buoy marked Koserowbank O. off the shoal's eastern side. Another offshore feature is Koserow Steingrund, a large rock, measuring in length and in width. It is aligned in an east-west direction and is demarcated by a white spar buoy, marked Koserow Steingrund N..