Because it’s commanding you (or the AP) where to go to stay on horizontal and vertical track. So in this case, it’s saying you need to pitch 5° nose up, and bank about 15° to the left (line up your yellow V with the magenta V)
Because it’s commanding you (or the AP) where to go to stay on horizontal and vertical track. So in this case, it’s saying you need to pitch 5° nose up, and bank about 15° to the left (line up your yellow V with the magenta V)