I believe the answer is B ^^
An astrolabe<span> is an elaborate </span>inclinometer<span>, historically used by </span>astronomers<span> and </span>navigators<span>, to measure the </span>inclined position<span> in the sky of a </span>celestial body<span>, day or night. It can thus be used to identify stars or planets, to determine local latitude given local time and vice versa, to survey, or to </span>triangulate<span>.</span>
