U.S. Navy JAG Corps. Navy JAG Community â Dedicated to Service, Committed to Excellence. From Navy Judge Advocate General Corps Public Affairs Lt. Genevieve Loutinsky, a judge advocate at the Office of the Judge Advocate General, attended a reception honoring military women hosted by [â¦] Continue Reading...
We measure angles using a tool called a protractor. A protractor is half of a circle. A protractor uses units called degrees to measure angles. A protractor can measure angles starting from the left or from the right. It measures from 0 to 180 degrees. 180 degrees is half of the measure of a circle.
These instruments are used primarily to measure the elevation or altitude of a celestial object: 1  Back staff, the best known of which is the Davis' quadrant. It could measure the altitude of the sun without having the navigator directly observe the sun.  Cross staff, an older instrument long out of use.