The modified "Durance"-class oiler is in length, with a beam of , and a draught of , with a full load displacement of 18,221 tonnes. Propulsion machinery consists of two SEMT-Pielstick 16 PC2.5 V 400 diesel motors, which supply to the ship's two propeller shafts. Top speed is , and the ship has a range of at . "Success" has a total capacity of 10,200 tonnes of cargo: 8,707 tonnes of diesel fuel, 975 tonnes of aviation fuel, 250 tonnes of munitions (including guided missiles and torpedoes), 116 tonnes of water, 95 tonnes of components and naval stores, and 57 tonnes of food and other consumables. Fuel and liquid stores can be transferred from four points (two on each side), allowing "Success" to replenish two ships simultaneously, while solid cargo can be moved via vertical replenishment (with a hangar and helipad for a single Sea King, Seahawk, or Squirrel helicopter), or by boat (the RAN LCVP "T 7" is carried on a starboard FWD davit). The ship is armed with seven 12.7 mm machine guns, and is fitted for but not with a Mark 15 Phalanx CIWS. The sensor suite includes two Kelvin Hughes Type 100G navigation radars. Ship's company is made up of 25 officers and 212 sailors.