Prayers and wreaths for Titanic's dead

With prayers, a hymn and a moment of silence broken by a ship's deep whistle, passengers and crew on a memorial trip marked 100 years to the moment since the Titanic took 1,514 people to a watery grave.

In the north Atlantic, they lined the decks of the MS Balmoral, a cruise ship that has been retracing the route of the doomed liner, at the spot where the Titanic went down in the early hours of 15 April, 1912, after a collision with an iceberg.

Three floral wreaths were cast on to the waves as the ship's whistle sounded in the dark.