These engines had cylinders 20½ inches, 33 inches, and 58 inches diameter by 36 inches stroke, and were fitted into the screw steamer Rosario, whose dimensions are 275 feet 3 inches between perpendiculars, 34 feet 3 inches beam, and 19 feet 2 inches depth of hold, 1,862 tons gross, and the deadweight capacity 2,550 tons.

In the first three weeks of July, 1918, twenty-three ships of 122,721 deadweight tons were completed, making a total of 223 new vessels built under the direction of the board up to that time, the aggregate tonnage being 1,415,022 tons.