A recording of the Titanic's whistle gave three long blasts to signify the moment a century ago that she slipped her mooring to leave Southampton docks for a date with history.
A large audience of invited guests including relatives of those who travelled on Titanic attended a moving ceremony at the city's Ocean Terminal at dock gate four where the great liner left from.
Music was provided by the Southampton Choral Society and the Royal Marines Association Concert Band.
The guests were taken through a moving account of the Titanic's story and in particular how the sinking cost so many lives of the crew from Southampton.
After prayers, wreath laying on the water was led by the Lord Lieutenant of Hampshire, Dame Mary Fagan.
The entire audience were later presented with a single rose to cast into the sea as their own mark of remembrance.