ANSWER: Both
Explanation:
- Mahendra Suri was the 14th century Jain astronomer who wrote the Yantraraja, the first Indian treatise on the astrolabe.
- The astrolabe was introduced into India at the time of Firuz Shah Tughluq.
- An astrolabe is an elaborate inclinometer, historically used by astronomers, navigators, and astrologers.
- It is useful for locating and predicting the positions of the Sun, Moon, planets, and stars, determining local time given local latitude and vice versa, surveying, and triangulation.
