Kraken (cannon)

The kraken was a medium-sized type of cannon used on Safehold during the 9th Century of God.

It was a six-and-a-half-inch gun roughly eleven feet long, throwing round shot of nearly thirty-five pounds. 

The "standard" kraken, unlike the larger and longer "great kraken", or "royal kraken", was intended as a comparatively short-ranged, smashing weapon.