I heard on the radio that when the plane went down off Miami Beach this afternoon, a flotilla of private boats were on it almost immediately to try to find survivors. It’s similar to what happened in 911, when a large number of people spontaneously evacuated lower Manhattan across the rivers to New Jersey and Brooklyn.
Unfortunately, this time, even as rapid as the response was, it looks like the people were beyond saving.
[Update at 7:30 PM EST]
Here’s a link from a local blogger.