 The completed ship was 118 ft ( 36 m ) in length , had a beam of 24 ft ( 7 @.@ 3 m ) , and drew 10 ft 10 in ( 3 @.@ 30 m ) . A 1 @.@ 5 in ( 38 @.@ 1 mm ) -thick belt @-@ line of Swedish steel was included around the hull for icebreaking duties . William S. Grattan was powered by two Babcock & Wilcox coal @-@ fired boilers with steam engines rated at 900 horsepower ( 670 kW ) . A single propeller provided propulsion . The rated speed of the ship was 13 knots ( 24 km / h ; 15 mph ) . 
