Signet Maritime Corporation has just taken ownership of its ninth, newly-constructed tractor tug in six years. The tug, Signet Arcturus, is a 105-foot by 38-foot Z-Drive, which was designed by Robert Allan Ltd. in Vancouver, BC. The tug was delivered on May 25th by Patti Marine Enterprises of Pensacola, FL.Signet Arcturus gets its power from two Caterpillar model C175-16 engines, each of which is rated 3417 BHP at 1800 RPM. Those engines are paired to two Rolls-Royce US 255 CP azimuth thrusters...