ENDURANCE (Environmentally Non-Disturbing Under-ice Robotic Antarctic Explorer) is an autonomous underwater vehicle designed to map in three dimensions the geochemistry and biology of underwater terrains in Antarctica. The vehicle was built and designed by Stone Aerospace, and is the second incarnation of the DEPTHX vehicle, which was significantly reconfigured for the challenges particular to the Antarctic environment. The name of ENDURANCE is a backronym in tribute to Ernest Shackleton's Antarctic exploration ship Endurance.