Ключевые слова: attention, black, blue, buoy, channel, color, conical, danger, equipment, fairway, float, foothold, lake, liquid, mark, nautical, navigate, navigation, navigational, reconstruct, ripple, river, safety, sailing, sea, security, shipping, sign, solution, sphere, still, striped, surface, transportation, warning, warning sign, warning symbol, water, water marker, wave, yellow,