A new cultivar of Ginkgo, \u2018Menhir\u2019, that is characterized by its narrowly upright plant habit, its dense branching, its good response to transplanting with little growth loss after transplanting, and its leaves that are dark green in color with a glaucous coating. The jack system is operable by a powered driver fitted with a socket for coupling to a nut rotationally fixed to the jack system, wherein the driver is removable directly after use. The survey tool further includes a first acceleration sensor mounted at a first position within the downhole portion.