Bathysphere

AC 18

HP 80 (Hardness 10)

Speed swim 20 feet (alchemical; underwater only)

Space 15 ft. long, 15 ft. wide, 15 ft. high

Crew 1 pilot

Passengers 4

Piloting Check Crafting (DC 22), Engineering Lore (DC 20), or Piloting Lore (DC 20)