I don't understand this question, and need some help greatly. Thanks!

From the top of a cliff 160m high two buoys are observed. Their bearings are 337° and 308°. Their respective angles of depression are 3° and 5°. Calculate the distance between the bouys.

What i don't understand is what the bearings mean + if the angle of depression is 3° then shouldn't the bearing be 360 - 3? I'm confused by this.

Thank you!