 Boreas displaced 1 @,@ 360 long tons ( 1 @,@ 380 t ) at standard load and 1 @,@ 790 long tons ( 1 @,@ 820 t ) at deep load . The ship had an overall length of 323 feet ( 98 @.@ 5 m ) , a beam of 32 feet 3 inches ( 9 @.@ 8 m ) and a draught of 12 feet 3 inches ( 3 @.@ 7 m ) . She was powered by Parsons geared steam turbines , driving two shafts , which developed a total of 34 @,@ 000 shaft horsepower ( 25 @,@ 000 kW ) and gave a maximum speed of 35 knots ( 65 km / h ; 40 mph ) . Steam for the turbines was provided by three Admiralty 3 @-@ drum boilers . Boreas carried a maximum of 390 long tons ( 400 t ) of fuel oil that gave her a range of 4 @,@ 800 nautical miles ( 8 @,@ 900 km ; 5 @,@ 500 mi ) at 15 knots ( 28 km / h ; 17 mph ) . The ship 's complement was 134 officers and enlisted men , although it increased to 142 during wartime . 
