How did the lighthouse develop?

Until today, the lighthouse is still a kind of navigation mark in use, because it has obvious goals and reliable functions; However, limited by the weather, the working distance is close. In ports, inland rivers and narrow coastal waterways, there is also a sign floating on the water, called a buoy. Those with lights on them are called "lamp floats". "Light floating" is also developing. For example, the "light drift" of the Pearl River Estuary waterway was changed to "double light drift", and at night, the waterway was illuminated like a road by pairs of lights. Buoy movement is a problem, which should be detected and taken measures in time. The light floating energy is also very important. Japan has developed a tidal power generation device. If the actual test on light bleaching is successful, there is no need to change the power supply regularly. Navigation AIDS are trying their best to adopt automation technology and develop in the direction of few people or no management. Because of manual management, on the one hand, managers are too hard, on the other hand, they are prone to accidents. For example: 65438+1At 23: 00 on February 7, 1992, the "Daluoshan" entered the harbor at night tide and hit the rocks because the lighthouse of Mayou Reef in the Pearl River Estuary went out. After the accident, it was learned that the report had been received on the evening of February 6, and the light was extinguished. The person in charge of warning the release was not on duty when he went home to visit relatives, so no warning was issued.