One thing to consider is the amount of time you use to load the boats the way you want to.

People always argue about "if only she had enough lifeboats", well, the fact of the matter is that she sank before she could launch all of boats she did have!

Also, It took Titanic 2 hours and 40 minutes to sink. But it took and hour and five minutes of that time to asess the damage, give the orders, uncover the boats, and swing them out and lower them to the level of the deck (The first boat to leave (#7), did not leave till 12:45).

It was not just lifeboats volume or loading capacity that made the disaster so large, but also the relatively horrible amount of time it took to get the evacuation process going (due to the fact that the evacuation took place basically by word of mouth).