Doesn't "mechanized" mean something with moving parts? I can see how ski bindings are mechanized, but an oar does not have moving parts in and of itself. Interesting question.
"There is NOTHING--absolute nothing--half so much worth doing as simply messing about in boats. Look here! If you've really nothing else on hand this morning, supposing we drop down the river together, and have a long day of it?" -Wind in the Willows