Saturday shoppers were greeted with the unusual sight of a boat in Queens Square.
The craft will be at the centre of a fundraising challenge which will see its crew of five row 3,000 miles across the Atlantic.
Team Atlantic Splash will set off on December 2 and will face 50ft waves, tropical storms and their own exhaustion before they reach their destination.
Money raised will be split between Great Ormond Street Hospital, Tall Ships Youth Trust, British Heart Foundation and Macular Society.
See their website www.rowtheatlantic2013.co.uk for further details.