what is dwt
Deadweight tonnage (also known as deadweight; abbreviated to DWT, D.W.T. , d.w.t. , or dwt) or tons deadweight (TDW) is a measure of how much mass a ship is carrying or can safely carry; it does not include the weight of the ship.eadweight tonnage (also known as deadweight; abbreviated to DWT, D.W.T. , d.w.t. , or dwt) or tons deadweight (TDW) is a measure of how much mass a ship is carrying or can safely carry; it does not include the weight of the ship.