Complex sentence: The ropewalk at Chatham Dockyard (as part of the Ropery or Ropehouse) is still producing rope commercially and has an internal length of 1,135 ft (346 m).
Split into simpler sentences: The ropewalk at Chatham Dockyard (as part of the Ropery or Ropehouse). It is still producing rope commercially, and the rope walk has an internal length of 1,135 ft (346 m).