Complex sentence: He is notable as the officer in charge on the bridge the night when the "Titanic" collided with an iceberg in the Atlantic Ocean, he was one of the 1,500 people who died in the disaster.
Split into simpler sentences: He is notable as the officer in charge on the bridge the night when the "Titanic" collided with an iceberg in the Atlantic Ocean. He was one of the 1,500 people who died in the disaster.