An indistinct marsh, seasonal marsh or an area of gradual transition from marsh to firm ground, which is crossable. The edge is generally indistinct and the vegetation similar to that of the surrounding ground.
The symbol shall be combined with other symbols to show runnability and openness.
The symbol is orientated to north.
Minimum area: 2.0 mm x 0.7 mm (footprint 30 m x 10.5 m).