Here is the mirage theory from the Smithsonian Magazine that I was talking about Sunday morning: New research may have found the reason why the ship struck an iceberg: light refraction By Tim Maltin
here are other articles on the mirage theory.
http://www.weather.com/outlook/weather-news/news/articles/weather-sinks-titanic_2012-04-12
http://www.thehindu.com/todays-paper/tp-opinion/article3301679.ece
Thank you. This study explains why the Titanic lookouts didn’t see the iceberg sooner, and why both ships didn’t see the other ship’s Morse Signal Lamp.