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.
Is this crazy? Can anyone tell me how long it will really take to drive from Rome to Venice? Checking the maps, it looks like it might take 6 1/2 hour to 8 hours? We have already paid for the rental car and we have the time, therefore, we don't want to splurge on the train or for plane fare.