Cave Hog

Cave Hog is the nickname given to the Amphibious All-Terrain Mining Vehicles that are utilized in the excavation of the Great Cavern which houses Leviathan City.  In addition to expanding and terra-forming the Cavern for hospitable uses, Cave Hogs are also used for the mining of terramite.  Terramite is rare mineral found in subterranean lava tubes in the deep ocean and can only be formed under tremendous pressure, like those found in the Mariana Trench.  When bonded with a proprietary titanium alloy under extreme heat, the terramite forms a low weight substance well suited to resisting ocean pressure at depths over 35,000 feet.  Because of the severe abrasion experienced by Cave Hogs during their mining and deep ocean tasks, a thick coat of terramite armor covers the hull of the vessels granting a resemblance to sea turtles.  Four heavy-duty diamond tipped grinder balls, capable of spinning at over 30,000 RPM, adorn the front of each Cave Hog allowing each vessel to tear through almost every form of rock or seabed.  But despite their invulnerability, Cave Hogs are notoriously prone to overheating if their coolant pumps fail or their water intake valves become clogged with detritus.  For that reason, it is standard safety protocol that two sets of emergency exposure suits are always equipped in each Cave Hog to enable a manual escape if necessary.