This is (Planet) Traffic Control - For station approach, please select and follow the beacon N on your compass
Now the Advanced Compass also shows the rectangle for the station, and it is newly added as a selectable target after the message. However the N has been selectable system wide and also gets destroyed sometimes. It feels more natural (to me) for the Advanced Compass's message to also read "rectangle" instead of "beacon N" - although the comment about selecting it is still necessary.
It's Traffic Control OXP, not Planetfall OXP (both mine). It's designed to take you to the station either way, and with the ASC both will be equivalent. But the N comes up a lot earlier (as you say from anywhere in the system), so is more accurate. You don't have to get anywhere near the planet for it to happen, as you do if you're following dots and rectangles.
It's Traffic Control OXP, not Planetfall OXP (both mine). It's designed to take you to the station either way, and with the ASC both will be equivalent. But the N comes up a lot earlier (as you say from anywhere in the system), so is more accurate. You don't have to get anywhere near the planet for it to happen, as you do if you're following dots and rectangles.
Ooops - my bad. Didn't realise it was one of your additions