Complex sentence: Additional Benchmark records he established include the total of miles transited in the combined efforts--a total of 600 + miles (960 + kilometers) over the bottom in the three contiguous years in an engineless live aboard boat.
Split into simpler sentences: Additional Benchmark records he established include the total of miles transited in the combined efforts. A total of 600 + miles (960 + kilometers) over the bottom in the three contiguous years in an engineless live aboard boat.