a speed adjustment
It would provide another side of the triangle if they told you
what the speed adjustment was in kts.
Reminds me of the old plotting question, "At what time and what position would you need to leave your existing track from A to B in order to arrive over your Diversion field, C, at the same time as you would have arrived over your original destination B. 30 marks! (GS of moving base etc.). So useful to me at the time, flying the BN2 Islander!
