The first of the newest support ships for the Royal Navy, RFA Tidespring, has arrived in Cornwall for customisation, helping to sustain 300 UK jobs.The 39,000-tonne tanker, which can carry up to 19,000 cubic metres of fuel and 1,400 cubic metres of fresh water, will join the Royal Fleet Auxiliary, a civilian-manned fleet which provides support for warships, helping the Royal Navy to maintain its operations 24/7, 365 days a year, around the world.