It is made of brass and is around the size of a large pocket watch, with a normal clock dial showing roman numerals and a smaller dial at the bottom for the second hand. the clock is suspended inside a swiveling brass ring fitted to the inside of a wooden box – this is the key to keeping the chronometer level even in an unsteady ship.
the author uses to explain the importance of the chronometer and the reader visualize it.
a: context clues
b: descriptive details
c: detailed synonyms
d: text features