The Cannon Boat Unit was an older Unit designed to preform surprise mortar attacks in shallow water. In robot mode, the Unit features pincer like hands and it's Sonar Staff, which can act as an echolocation device to detect enemies. This can be stored on the back in robot mode. It's large Cluster Mortar Cannon cannot be fired in robot mode, but can be detached to act on its own. In short stature allows it to hide in marshland easily. In boat mode, the Unit can more easily use it's cannon, allowing it to cluster bombs over a large area. It's staff converts to it's periscope and sensory array. It can dive to up to 100 feet, but not for extended periods of time. It's older design is outclassed by the Undersea Defender Unit but nevertheless, their old model is reliable and better for area damage.