The two main objectives of the expedition were summarised in the joint committee's "Instructions to the Commander" as: "to determine, as far as possible, the nature, condition and extent of that portion of the south polar lands which is included in the scope of your expedition", and "to make a magnetic survey in the southern regions to the south of the fortieth parallel and to carry out meteorological, oceanographic, geological, biological and physical investigations and researches". The instructions stipulated that "neither of these objectives was to be sacrificed to the other".