It is not necessary, for the reason that in a small boat the boom, as it is called, to stretch the foot of the sail, runs out directly from the foot of the mast to which it is pivotally hinged.
"The Wonder Island Boys: Exploring the Island"
Roger Thompson Finlay
The man gave his head a tilt forward which seemed to close his eyes, turned pivotally about, and walked out of the room in his most luxurious manner.
"The Wizard's Daughter and Other Stories"
Margaret Collier Graham