The original passenger lists from the Titanic are being made available online for the first time, 95 years after the ocean liner sank on its maiden voyage.
The lists could previously be seen only at the National Archives in Kew, south-west London.
They will be free to view on the findmypast.com website for a week - after which a fee will be charged.
The anniversary of the disaster, which claimed 1,523 lives, will be marked on Sunday with a service in Southampton.
The ship set sail from the Hampshire city on 10 April 1912, and 549 of the victims hailed from there.
The outdoor public service will be held at the Titanic Engineer's Memorial in Above Bar Street in the city centre at 1100 BST.
Searching through the lists of passengers who sailed on the Titanic has been awkward in the past, as they have been kept in 34 separate boxes at the Kew museum.
It is hoped that the move to put them online will help people who are trying to trace relatives who moved abroad.
The Titanic lists are part of a larger project - with 1.5m ship passenger lists dating back to 1890 being put online.
Elaine Collins, from the Findmypast website, said the lists provided a fascinating insight.
"What you're going to find is the details about the voyage - the individuals, what class they were travelling, where they were planning to land, their country of intended future permanent residence," she said.
Topic: Titanic passenger lists go online (Read 1263 times)