The former Royal Yacht Britannia has been hailed as one of Scotland's most successful tourist attractions.
This year is the 50th anniversary of Britannia's launch
Details of the achievement were announced as staff on the vessel celebrated its fifth birthday as a visitor experience in Edinburgh.
In that time more than 1.6 million people have toured Britannia, 60%
more than was originally forecast.
The yacht has been voted runner-up in the Best UK Attraction 2003 awards and gained 100% customer satisfaction in a visitor survey by an independent research company.
Director of the Royal Yacht Britannia Bob Downie said: "We are delighted at
how successful Britannia has been as a visitor attraction and unique corporate event venue and being voted Best UK Attraction 2003 runner-up was fantastic news."
The yacht is housed at the Ocean Terminal, Edinburgh's £120m shopping and leisure development on the Leith waterfront.
Owned by a charitable trust, all proceeds go towards her long-term
maintenance and she receives no public funding.
This year is also the 50th anniversary of Britannia's launch and customer
research has confirmed her as Scotland's leading visitor-friendly attraction.
Described as the "pride of Britain's maritime heritage", the ship moved to
her permanent berth at the terminal in October 1998 after more than 40 years' service for the Royal Family.
Britannia was brought to Edinburgh by Forth Ports plc in the face of stiff
competition from other cities to be its final port of call.