Re: tilt and trim is a misnomer??
I may be wrong but I think the term "trim" refers to the adjustment made while running the boat. The term "tilt" refers to the adjustment made when the boat is not running.
On the boats I have owned, (outboards), the trim adjustment is much less than the total tilt adjustment, making sure the lower unit stays in the water while running.
It is all the same mechanism, but when using "trim" on my boats while running, the lower unit never raised as high as it would using the "tilt" when out of water and not running, ensuring the lower unit stayed deep enough. Not sure how it actually worked.
I hope someone corrects me if I am wrong.