Original sentence: At its heart is Tees Dock, a deep-water facility some 5 nautical miles (9 km) from the sea.Facilities include two Container Quays, one a 294 metres the other 360 metres, and Roll-on Roll Off (RORO) facilities.It is one of the United Kingdom's three largest ports and lies three miles (5 km) to the east of Middlesbrough.The port covers an area of 200 hectares (2 square kilometres) of land alongside the Southern bank of the River Tees
Edited sentence: At its heart is Tees Dock, a deep-water facility some  from the sea.Facilities include two Container Quays, one ; the other ; and Roll-on Roll Off (RORO) facilities.It is one of the United Kingdom's three largest ports and lies  to the east of Middlesbrough.The port covers an area of  of land alongside the Southern bank of the River Tees