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.
1 1 To visit Sorrento from the UK, use dealchecker's search tool to find flights into Naples.  2 Cheap Sorrento tickets are available with a variety of budget carriers, from airports around the UK. Examples include Monarch from Luton and Manchester or easyJet from Gatwick or Stansted.