Model of a 36-pounder cannon on a gun carriage, anonymous, 1800
The heavy artillery on naval ships consisted of cannon mounted on gun carriages. The calibre – or fire power – of naval cannon was expressed in pounds, according to the weight of the projectiles. The set on this plank represents guns of decreasing calibre, ranging from 36 pounds (far left), 30, 24 and 18 pounds to 12 pounds.