Zoom in on one distant terrain feature, the first U.S. vessel sunk in World War One:
"Alcedo, a 981 gross ton steam yacht built in 1895 at Glasgow, Scotland, was purchased by the U.S. Navy in June 1917 and placed in commission as USS Alcedo (SP-166) late in July. She crossed the Atlantic the next month to join the patrol forces fighting enemy U-boats in the waters off western Europe. In the early hours of 5 November 1917, while she was escorting a convoy en route to Brest, France, Alcedo was torpedoed and sunk by the German submarine UC-71. Twenty-one of her crew were lost with their ship."