Recognized as an "international strait" by the 1958 Geneva Convention on the Territorial Sea and Contiguous Zone, its major ports include Belawan on its western shore and Penang on its eastern.   
The Dreadnought Bank lies just to the north of this channel's wider entrance, while its southern entrance is marked by the Riau Archipelago.  A civil war in the province of Aceh, located northwest of the strait, has brought about an increase in pirate attacks in recent years. Recognized as an "international strait" by the 1958 Geneva Convention on the Territorial Sea and Contiguous Zone, its major ports include Belawan on its western shore and Penang on its eastern.   For 10 points - name this strait that separates Sumatra from the Malay Peninsula.
The Dreadnought Bank lies just to the north of this channel's wider entrance, while its southern entrance is marked by the Riau Archipelago.  
Strait of Malacca or Melaka