What can be used to find your way if you're lost in the dark?
lamphreys Ultraviolet shielding Light shining into it the speed of hearing The north star How to check the temperature Observing tidal waves osculum
A B C D E F G H
Explorers have used the North Star for navigational purposes for centuries.
You can use the north star for directions if you have the knowledge 
What can be used to find your way if you're lost in the dark? (A) lamphreys (B) Ultraviolet shielding (C) Light shining into it (D) the speed of hearing (E) The north star (F) How to check the temperature (G) Observing tidal waves (H) osculum