1. Teaching purpose of Maritime Traffic Lights: 1. Let students know the function of "traffic lights" at sea. 2. Know maritime navigation marks, know maritime routes and know maritime traffic rules. 3. Know some semaphores. Teaching process: 1. Understand the navigation mark at sea: Understand the appearance and function of navigation mark at sea through reading and discussion. Second, understand the sea routes and the rules of maritime traffic. Read and discuss. Third, know some semaphores. Know what these semaphores mean. 1, exchange the information you collected about semaphores. 2. Tell everyone what you have seen, heard and felt through your own understanding of the semaphore and the relevant information collected. Fourth, expand and extend: if you are the navigator of the ship, how will you make the ship move forward? Write your own plan. Fifth, the teacher summed up. 2. Approaching the Four Seas Teaching Purpose: 1. Let students know the four seas of the motherland. 2. Understand the inventory of the four major sea areas. 3. Cultivate students' patriotism. Teaching process: 1. Reading discussion: What are the four major sea areas in China? (Yellow Sea, Bohai Sea, East China Sea and South China Sea) 2. What is the dividing line between the main sea areas? Third, understand the four major sea areas. 1, share the information you have collected about the four major sea areas. 2. Tell everyone what you have seen, heard and felt through the information you have learned and collected about the four major sea areas. Fourth, expand and extend: If you are an oceanographer, how will you make the ocean serve mankind? Write your own plan. Fifth, the teacher summed up.