The article discusses the oceanographic research during the second leg of the Arctic expedition ARK-XXIII. The expedition started in Longyearbyen, Spitsbergen, Norway on July 4, 2008. The goal of the expedition was to measure the mass and heat fluxes through Fram Strait, as well as to determine their transport variability on seasonal to decadal time scales. The main activities during the oceanographic work at sea were the recovery and redeployment of moorings and the measurements of conductivity, temperature and depth (CTD) profiles.