Titanic Historical Society of the disaster in Boston, Massachusetts. The event brought together several living survivors, including Eva Hart, Louise Pope, Michel Marcel Navratil, and Beatrice Sandstrom, who enthralled those in attendance with their vivid first-person accounts of the night the "Titanic" foundered in the north Atlantic Ocean. Walter Lord, author of his seminal "Titanic" work, "A Night to Remember", was another featured guest. The Society also works to preserve the history of other ocean liners, especially the "Titanic" 's sister ship, the White Star Line's HMHS "Brittanic", which sank after hitting an enemy mine in World War I, and the Cunard ship
Sister ship American sister ships and , and the German Hindenburg class airship's "Hindenburg" and "Graf Zeppelin II". The generally accepted commercial distinctions of a "sister ship" are the following: The critical overriding criteria are the same hull design. For example, the popular TESS-57 standard design built by Tsunishi Shipbuilding are built in Japan, China, and the Philippines. All the ships of this design are classed as "sister ships". The International Maritime Organization defined "sister ship" in IMO resolution MSC/Circ.1158 in 2006. Criteria included these: Sister ship A sister ship is a ship of the same class or of virtually identical design