Complex sentence: One of their ships collides with a satellite and crashes in Hong Kong, causing heavy casualties while the other four (a Mothership and three warships with red, green and blue sidelights) land in the water near Hawaii.
Split into simpler sentences: One of their ships collides with a satellite and crashes in Hong Kong, causing heavy casualties. The other four (a Mothership and three warships with red, green and blue sidelights) land in the water near Hawaii.