Each inquiry took testimony from both passengers and crew of Titanic, crew members of Leyland Line's Californian, Captain Arthur Rostron of Carpathia and other experts.
Komisia vypočula preživších cestujúcich i členov posádky Titanicu, kapitána Arthura Rostrona lode Carpathia, posádku lode spoločnosti Leyland Line Californian a ďalších.