The official machinery trials of the first-class torpedo gunboat Circe (length between perpendiculars 230 feet, beam 27 feet, draught 8 feet 9 inches, displacement 830 tons; trial speed 18.7 knots) built at the Sheerness Dockyard and engined by Messrs. John Penn and Sons. Of Greenwich, took place on the 27th of February 1893. The Circe was fitted with two 22 inch by 34 inch by 51 inch by 21 inch stroke inverted-vertical triple-expansion marine engines operating at 224 revolution per minute with steam supplied at 140 pounds per square inch by four marine locomotive boilers, each 7 feet 6 inches in diameter by 15 feet 9 inches long, with a total grate area of 182 square feet, and a total heating area of 6250 square feet.