celestial navigation

وَهُوَ ٱلَّذِى جَعَلَ لَكُمُ ٱلنُّجُومَ لِتَهْتَدُوا۟ بِهَا فِى ظُلُمَـٰتِ ٱلْبَرِّ وَٱلْبَحْرِ ۗ قَدْ فَصَّلْنَا ٱلْـَٔايَـٰتِ لِقَوْمٍ يَعْلَمُونَ

It is He who made the stars, so that they can guide you when land and sea are dark: We have made the signs clear for those who have knowledge.

وَعَلَـٰمَـٰتٍ ۚ وَبِٱلنَّجْمِ هُمْ يَهْتَدُونَ

and landmarks and stars to guide people.