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Harpoon cannon
From Wikipedia, the free encyclopedia
"Harpoon gun" redirects here. For the diver's handheld weapon, see speargun.
A harpoon cannon is a whaling implement developed in the late 19th century and most used in the 20th century. It would be mounted on the bow of a whale catcher, where it could be easily aimed with a wide field of view at the target. Powered by black powder and later, smokeless powder, it would generally fire a large steel harpoon, either solid steel (cold harpoon) or fitted with an exploding black powder, or later, penthrite (PETN) grenade.
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Harpoon cannons are still used by whaling nations, but these are usually guns of a smaller caliber. The exception is Iceland, which hunts large whales regularly.