在海岸周圍拉起繩索並框出固定範圍，發生離岸流時，由水流計偵測流速，並且於上方發出燈光，警示⺠眾請勿靠近此區域。
以發生離岸流時能立即警示在海邊與海岸嬉戲的遊客為主要
Pull up ropes around the coast and frame a fixed range. When rip currents occur,A water flow meter detects the flow rate and lights up above to warn the public not to approach this area.The main purpose is to immediately warn tourists playing on the beach and shore when a rip current occurs.
