HMD - Why can't HAFUs be displayed outside the small central area?

[Callsign JoNay]

A friend of mine shared a video with me today that featured an ACM sub mode that I didn't know about called UPLOOK. 

https://www.youtube.com/watch?v=KfPw8nOSd2g&t=4s (Time code: 18:11)

It got me wondering how the HMD is able to project the uplook reticle so far off the boresight of the HMD, when other important symbology like DL16 HAFUs are limited to a very tight central area in the display. Here is a picture to demonstrate:

Is this working as intended? I can't help but imagine how incredible our SA would be if we could see HAFUs that far into our peripheral vision. 

[Muchocracker]

Nothing should be rendering outside of that small box. So any element that is would be a bug. 

[Callsign JoNay]

23 minutes ago, Muchocracker said:

Nothing should be rendering outside of that small box. So any element that is would be a bug. 

So you're saying the uplook reticle should be inside the small box?

[Swift.]

On 8/3/2024 at 2:09 AM, Callsign JoNay said:

So you're saying the uplook reticle should be inside the small box?

As I recall the uplook reticules are a different projector. Which is why they never change shape or size. Only turn on or off.

[Callsign JoNay]

8 hours ago, Swift. said:

As I recall the uplook reticules are a different projector. Which is why they never change shape or size. Only turn on or off.

That would make a lot of sense. Is there a publicly available diagram or something to confirm?

[Swift.]

11 hours ago, Callsign JoNay said:

That would make a lot of sense. Is there a publicly available diagram or something to confirm?

https://www.globalsecurity.org/military/library/policy/navy/ntsp/jhmcs-d_2002.pdf

I think this will show what I'm talking about.

[Callsign JoNay]

4 hours ago, Swift. said:

https://www.globalsecurity.org/military/library/policy/navy/ntsp/jhmcs-d_2002.pdf

I think this will show what I'm talking about.

Perfect, thank you.