Tristan decided to switch off the Windrose once he found a secure place to land and hide. He needs to radio Uncle Alex and the Palace team that he would be unreachable by radio frequencies and signals when his Windrose is switched on.
The Octagon is precisely at the midpoint between the city gate and the King's Palace. But Uncle Alex has set a route for Tristan to avoid tall buildings and skyscrapers that preoccupied the area between the City's gate and the Fort.
So, instead of flies following the main street, Tristan takes a right flank of the gate and then flies toward the Fort, passing the Falcon Forest.
Falcon Forest looked tremendously dense, with big trees, some winter bushes, and several hills carving the Forest's terrain. The Forest is also snowy at this time of the year.
Luckily, as he flies above the Forest, Tristan finds the big trees and hilly terrain provide the perfect cover to stay hidden without using Windrose's invisible mode.