Jacob Jones II (Destroyer No. 130), Naval History and Heritage Command, https://www.history.navy.mil/research/histories/ship-histories/danfs/j/jacob-jones-ii.html
One representative ship is James Jones II, a destroyer torpedoed near the coast of Cape May when it was doing her patrol during February 1942. A German submarine U-578 torpedoed Jacob Jones unsuspected. Not only ships that serves military got torpedoed by German submarines.
“All but 25 or 30 officers and men, including Lt. Comdr. Black, were killed by the explosions. The survivors, including a badly wounded, “practically incoherent” signal officer, went for the lifeboats… Jacob Jones remained afloat for about 45 minutes, allowing her survivors to clear the stricken ship in four or five rafts. Within an hour of the initial explosion Jacob Jones plunged bow first into the cold Atlantic; as her shattered stern disappeared, her pressure-fused depth charges exploded, killing several survivors on a nearby raft.” – On Jacob Jones, Naval History and Heritage Command
Another highlighted casualty loss indicated by the map is Cayru which was torpedoed in 1942 by U-94. Even though it was not supposed to be involved in the war as a freighter steam, it was attacked and 38 lives were lost. These are only two of many shipwrecks that were affected by the war and had well recorded information.
Many of the ships that were lost during this period of time did not have casualty information recorded, which indicates the silence of the dataset and the casualty could be underestimated. Another weakness shown by the map is that the data set concentrated on the shipwrecks around New Jersey coast so there was little comparison that could be drawn to show difference in New Jersey and other locations in the US.