A steam yacht (length 147 feet overall, 125 feet on the water line, moulded breadth and depth 20 feet and 11.7 feet, draught 6 feet forward, 10 feet aft; tonnage 165; speed 11.675 miles per hour) was fitted with an 11 inch by 17 and a quarter inch by 27 and a half inch by 22 inch stroke inverted-vertical triple-expansion engine; operating at 120 revolutions per minute on steam suppled at 160 pounds per square inch, built by Steward and Latham of Blackwall.