I think, instead of listing disasters, bearing in mind the Titanic, it'd be appropriate to narrow them down to cases where lessons were learned + changes made as a result.
For example, everyone knows the story of how there weren't enough lifeboats on the Titanic for the crew and passengers, because the assumption was that another ship would always be nearby + come running to save people. Nowadays, there are of course rules about lifeboat spaces, crew drills, standard SOS communications, and so on.
So, with that in mind - the 1975 Moorgate crash on the London Underground. Wikipedia has the details:
>https://en.wikipedia.org/wiki/Moorgate_tube_crash...but the gist is, for reasons that are unknown to this day, in February 1975 a Tube driver failed to stop at Moorgate station, the end of the line - driving his train at full speed into a wall, killing 43 people and seriously hurting 73. The picture shows the condition of the carriages, before and after.
>It took 13 hours to remove the injured, many of whom had to be cut free from the wreckage. With no services running into the adjoining platform to produce the piston effect pushing air into the station, ventilation was poor and temperatures in the tunnel rose to over 49 °C (120 °F). It took a further four days to extract the last body, that of Newson; his cab, normally 91 centimetres (3 ft) deep, had been crushed to 15 centimetres (6 in).>Tests showed that Newson had a blood alcohol level of 80 mg/100 ml—the level at which one can be prosecuted for drink-driving—though the alcohol may have been produced by ***the natural decomposition process over four days at a high temperature***.The outcome, as far as the thread is concerned, is that 'Moorgate protection' was installed to all 'dead end' terminus stations, which would apply the brakes automatically if a train failed to stop. So, at least something good came of it.
