Complex sentence: As the Japanese moved toward the Korean fleet, Admiral Yi enticed the Japanese fleet to a long and narrow strait which has fast and strong wave-flow and he hampered the Japanese fleet's navigating by blocking the strait with steel chains.
Split into simpler sentences: As the Japanese moved toward the Korean fleet, Admiral Yi enticed the Japanese fleet to a long and narrow strait with a fast and strong wave flow. He also hampered the Japanese fleet's navigating by blocking the strait with steel chains.