noun
1. : a set of observations for the determination of time that are usually made with a transit instrument
2. : an observation by sextant of the altitude of a heavenly body to determine longitude by comparing the local time with Greenwich time
noun
1. : a set of observations for the determination of time that are usually made with a transit instrument
2. : an observation by sextant of the altitude of a heavenly body to determine longitude by comparing the local time with Greenwich time
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012