1827  (1912)  Leaving Morgan's Rock . . . we went to the Rocky Launcher and encamped at 10 p.m.
1923  In localities where there was a large number of "launchers" and the boats were hauled over portages, 28 to 30 feet was the length [of a York boat]. On routes where there were no "launchers", the length was 38 to 40 feet.