The OP is not asking about the Hybrid FPV. He wants to understand the relationship between barometric altitude, FPV, and VS. The key is that VS is actually Vzbi, and the FPV uses Vzbi in its calculation. Vzbi is a mix of barometric and inertial vertical speed. It's a different topic than the L4.2 mod. The OP's fleet may or may not have the L4.2 MOD embodiment anyway; half the fleet at my operator doesn't.
Last edited by CrazyStuntPilot; 26th Feb 2022 at 15:40.