A U.S. Warship Fires an Anti-Sub Weapon on a German U-Boat WW2 ( Video ) August 18, 2018 Unipro2013main German U-Boats WW2, Pacific WW2, US Navy, WW2 USS Guadalcanal The USS Guadalcanal has spotted a German sub in the waters off the coast of Madeira. They immediately order a strike with the navy’s new and devastating weapon: the hedgehog. Please support our Sponsors - Or Buy an Item from our Catalog