Contact Bearings???

Okay, so here I am sailing merily along. When boom, a map contact shows up. Alright, cool. I click on it, and it shows 3 bearings, scope bearing, true bearing and just bearing.. sometimes they can be the same, sometimes not. But which one is its Course?? Course is blank but sometimes it is filled with cardinal directions.. Its so confusing sometimes. Im used to GWX, NW at medium speed.