1. Even Powell, constantly consulting sextant and compass, felt flummoxed.

2. Other early instruments included the sextant and the astrolabe.

3. Sextant once played a very important role in navigation.

4. Sextant can be used for exploration and navigation .

5. Is sextant still widely used for navigation?

6. Reduction from sextant altitude to observed altitude for any of the 9110 stars, nine planets, and sun and moon.

7. To navigate , they must fix their sextant on something concrete.

8. You had to be able to fix your position just like a ship at sea,[http://] with sextant and star charts.

9. Once, Billy Hawkins got up in the middle of dinner, walked to the boats, and pulled out the sextant.

10. That was one of the problems of using the piste and a sextant.

11. Because of the track, navigation had been easy and I had been leaving my sextant in the Land Rover.

12. So I forgot about him, at least until that evening when I gave Ellen some practice with the sextant.