Confusing yes

I agree. this is very difficult to understand. after going through thru the interactive many times im starting to get it. but just testing my understanding now. The thing that thru me was that the previous examples kept indicating vectors for 1 hour. But the current is different. Wasnt clear that you get the current vector by using the current speed to calc the current distance. Also had to look up CTS. had not seen this mention in earlier examples. earlier it was called the adjusted track.