Ключевые слова: boat, bridge, buoy, circle, clear, cruise, danger, deep, diagonal, drown, drowning, emergency, ferry, float, help, horizon, landscape, life, lifebuoy, lifesaver, liner, north, object, ocean, protect, red, rescue, ring, round, russia, safe, safety, save, sea, secure, security, ship, sink, sky, sos, swim, symbol, tourism, travel, urgent, vessel, warningblue, yacht,