Complex sentence: It has a main span of 430 metres and an overall length of 750 metres and, because it spans the main marine channel, Kap Shui Mun, between Ma Wan and Lantau, its vertical headroom is more than 47 metres above sea level.
Split into simpler sentences: It has a main span of 430 metres and an overall length of 750 metres. It spans the main marine channel, Kap Shui Mun, between Ma Wan and Lantau and provides vertical clearance of 47 metres above sea level.