A photograph of the torpedo gun boat Almirante Simpson (length 240 feet, beam 27 feet 6 inches, depth 16 feet, displacement 858 tons o.m. designed speed 21 knots) fitted with two sets of Messrs. Laird's 5,000 indicated horsepower (total) high speed triple-expansion marine engines, with steam supplied at 200 pounds per square inch by four Normand water-tube boilers, running at full speed.