Hence, the Royal Navy developed a deadly efficient ASW weapon to complement its depth charges: the Hedgehog spigot mortar. As noted by the Dark Skies MSN channel in the text caption to their video ...

An old World War Two defence has been found in a Coventry hedgerow. The 29mm 'spigot mortar' is said to be a "rare" example of wartime defences placed around the city. It fell "just short" of ...