Watch: The missing Titanic sub... in 75 seconds

They are a needle in a haystack. I have a major issue with the fact that they didn't have an emergency beacon. Relying on technology to save you is a huge mistake. Having a underwater vehicle with limited ability to move ballast is a huge mistake. Taking tourists down below 500ft is a huge mistake.
People don't understand just how unforgiving the oceans are, and this will be a major wake up call, as well as an expensive one for the company.