The USS Turner Sank in January 1944. The ship was preparing to unload it's munitions and bring it ashore . The crew wasn't properly trained to disarm the munitions and they blew up and killed about 125 men . The Turner was anchored at the Mouth of Gravesend Bay at the Tin Can Grounds. The Coast Guard used a Helicopter for the first time to rescue survivors. The Explosion was heard all over NYC, my father was 10 years old at the time and heard it inside his Bay Ridge Brooklyn Home. The Turner had to anchor outside NY Harbor ( where they were anchored was protected by a Submarine Net so it wasn't sunk by a U Boat) because it was so crowded in the harbor. At Peak during WW 2 , there were 600 ships inside the harbor. You drive over the Verrazano Bridge today you see a few ships here and there. 600 Ships !