The Koehler Depressing Carriage was a novel type of gun carriage invented in 1782 by Lt George Frederick Koehler of the Royal Artillery. It was devised...

side of a mountain without sending the gun carriage flying into the air. The Koehler Depressing Carriage is still commemorated today in Gibraltar where...

Upper Gallery housed four guns, mounted on specially developed "depressing carriages" to allow them to fire downwards into Spanish positions on the isthmus...

were replaced with more modern 64-pounder rifled muzzle loaders on iron carriages, some of which can still be seen in the tunnels. Although Ince's galleries...

allowed a cannon to fire at a downward angle: the new depressing gun-carriage devised by George Koehler allowed guns to be fired down a slope. This was demonstrated...

Battery was the site of the first use of Lieutenant George Koehler's depressing gun-carriage. This allowed the angle of the gun to be aimed down at an...