investigating F-18 HUD deviation

ginn · 2025-07-26T12:39:50Z

I’d like to report a bug. The HUD of the F/A-18 occasionally shifts (as shown in the image). There was no wind on the server, and I selected a hot start instead of a cold start, so we can rule out user error.

I spawned using a dynamic parking hot start at Kutaisi airbase, with a loadout of two Mk-84s and two Mavericks. Everything looked fine during taxi, but as I accelerated for takeoff, the HUD suddenly shifted to the left. Again, there’s no wind on the server, so external factors shouldn’t be the cause.

When I switched to the F-16, the HUD remained stable during takeoff, which further suggests this issue is specific to the F/A-18. From my experience, this problem only happens when using dynamic parking spots — I don’t recall encountering it with traditional ramp or runway starts.

Additionally, in some single-player missions, the F/A-18 starts hot with the IFA countdown screen stuck. Thecountdown continues, but the page doesn’t disappear as it should.

多人联机打靶图20250721练飞,对空对地,编队,空加-20250726-195457.trk

Tholozor · 2025-07-26T13:02:24Z

If the INS goes to IFA RDR when the knob is placed in IFA, there is no GPS available (or line of sight to the satellites is blocked), and the aircraft is attempting to perform an in-flight alignment.

ginn · 2025-07-26T16:47:24Z

3小时前，Tholozor说：

If the INS goes to IFA RDR when the knob is placed in IFA, there is no GPS available (or line of sight to the satellites is blocked), and the aircraft is attempting to perform an in-flight alignment.

This I know. You can see in the video that in such situations, after dynamic placeholder hot alignment is completed and the INS is also aligned, the HUD still shows deviation during takeoff.