Monaco-based Silversea Cruises has returned to Italy's Fincantieri for another cruiseship newbuilding.

The two companies have signed a deal worth about EUR 310m ($373m) for an "ultra-luxury" vessel due in 2020.

The 40,700-gt Silver Moon will be a sister to Silver Muse, delivered in April from Fincantieri's Genoa yard.

The ship, which will be Silversea's tenth, will carry 596 passengers.