natural=coastline [0x15 resolution 12]

route=ferry {add mkgmap:ferry=1} [0x1b road_class=3 road_speed=0 resolution 19]

waterway=canal [0x1f resolution 21]
waterway=drain [0x1f resolution 22]
waterway=river [0x1f resolution 18]
waterway=rapids|waterway=waterfall [0x1f resolution 22]
waterway=stream [0x18 resolution 22]