Go to the Fort's Tower | Chapter 11 - The Crash DI Riptide Guide
Last update: 11 May 2016
Return to previous area and unlock the gate. Go upstairs and head for exit.
When you return to the surface, head for the eastern part of Henderson Fort. When you pass stairs thanks to which you get to the Fort, turn slightly right what takes you to a ladder (screen above). Use it to get to one of smaller Fort's towers.
Approach the second ladder and go downstairs. Now you can head for the main tower.