What are the lines of triangles on the DCA RWY 19 River Visual approach chart?
So, applying some local knowledge, the Key Bridge is a high arch bridge in that it is a good distance above the water level, and the other ones listed, Rochambeau, Memorial , Roosevelt, and Chain Bridge are all &quot;low&quot; bridges, more like causeways.
I tried looking for a chart legend that said this, but I wasn't able to find one.