The 18.4 release brings with it a new systems page which allows for better management of the buttons. One of the most common questions is “What is FPV?”.
First, if you are not familiar with all of the elements of the HUD take a moment to reference Mark Denton’s wonderful info-graphic.
What is FPV?
FPV stands for Flight Path Vector. The FPV is the circular icon at the middle of HUD while in the air. The circle represents where your plane is headed based on variables such as wind/weight/etc. In comparison the Attitude Indicator indicates where the nose of your aircraft is pointing.
When the wind is calm, majority of the time these two indicators pretty much line up. In a crosswind landing these two indicators are often to the side of each other.
How to turn it on/off?
18.4 introduces the option to turn off the FPV icon. This is yet another way to add realism since it can be toggled on/off in the real world for some aircraft. To toggle it on and off, press the systems button to open the systems menu and then select the FPV button. The button with be in an orange border indicating it is turned on. The FPV is on by default.