It is reckoned in hours and minutes all the way around the sky, eastward from a certain point, through the approximate 24 hours.
"Lectures in Navigation"
Ernest Gallaudet Draper
Each twenty-four hours, at the approximate approach of what was the noon hour when the sun had been above the horizon, the sky to the south of us glowed with marvelous, subdued sunset hues.
"My Attainment of the Pole"
Frederick A. Cook
It was difficult at this time even to approximate any probable course.
"My Attainment of the Pole"
Frederick A. Cook