Anewly designed bulk carrier 852 ft long displaces 100,000 tons at de draft. resistance tests have shown that the effective power, includ- sign ing air and appendage allowances, is 12,860 horsepower at the design speed of 16.5 knots. propulsion factors measured in self-propelled model tests are: wake fraction 0.325 thrust deduction fraction-0.178 relative rotative efficiency 1.025 the propeller test revealed that at its design point the propeller's open- water efficiency is 0.685. shaft transmission efficiency is estimated at 0.990, and a service power allowance of 20 percent has been chosen. from the data given, calculate this ship's propulsive efficiency, trial shaft horsepower, and service shaft horsepower.