What are they, and what causes them to flucuate???
Air traffic control mainly I think, but also when you acquire slots for new routes the one off slot charge is billed as a navigation fee too.
Quote from: azflyer on March 21, 2010, 01:26:33 AM
What are they, and what causes them to flucuate???
I believe the fluctuation is due to the rise and fall of supply.
When openting / editing a route, you are (usually) paying for airport slots. Those payments are listed under navigation fees.