The black bank line emphasises that the feature is uncrossable.
Dominant areas of water may be shown with 70% colour. Small areas of water and bodies of water that have narrow parts shall always be shown with full colour.
Minimum width (inside): 0.3 mm.
Minimum area (inside): 0.55 mm x 0.55 mm (footprint 8 m x 8 m).
Colour: blue, black.