The long ton is used for petroleum products such as aviation fuel. Deadweight ton (abbreviation 'DWT' or 'dwt') is a measure of a ship's carrying capacity, including bunker oil, fresh water, ballast water, crew and provisions. It is expressed in tonnes (1000 kg) or long tons (2240 pounds, about 1016 kg).
Trains between Naples and Sorrento depart once every half hour and take about 55 to 68 minutes in duration. Thus, to get from Rome to Sorrento, you would first take a train to Naples, where you would switch to a Circumvesuviana train down to Sorrento.
On many of the trains between Padova and Venice there is no 1st or 2nd class as they are the older R trains (no reserved seats either). It's all one class for 3.45â¬ with travel time of about 45 minutes.