U.S. investigators laid out a timeline showing the Cuauhtemoc, a Mexican naval vessel, was underway for less than 5 minutes before its masts crashed into the historic span of the Brooklyn bridge, and radio calls indicating it was in distress went out only 45 seconds before the deadly collision.

The investigation into why a Mexican Navy training ship struck the Brooklyn Bridge on Saturday, shearing the top of its masts, will look into a possible engine failure and the role of a tug boat that assisted it in backing out of its pier,