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.
Frequent Trains from Rome to Turin. Trenitalia's high-speed Alta VelocitÃ  (AV) trains cover the roughly 450-mile (724-km) distance (as the rail lines go) from Rome's Termini station to Turin's Porta Nuova station in 4 to 4.5 hours. Trains leave Rome bound for Turin once per hour during most weekdays, for a total of 45 trains making the trip per day. The first leaves Rome at 6 a.m., the last at 7 p.m., and ticket prices on this route range from $47-141.