The Tribals were intended to counter the large destroyers being built abroad and to improve the firepower of the existing destroyer flotillas and were thus significantly larger and more heavily armed than the preceding . The ships displaced at standard load and at deep load. They had an overall length of , a beam of and a draught of . The destroyers were powered by two Parsons geared steam turbines, each driving one propeller shaft using steam provided by three Admiralty three-drum boilers. The turbines developed a total of and gave a maximum speed of . During her sea trials "Eskimo" made from at a displacement of . The ships carried enough fuel oil to give them a range of at . The ships' complement consisted of 190 officers and ratings, although the flotilla leaders carried an extra 20 officers and men consisting of the Captain (D) and his staff.