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Posted

Hey All,

 

I am boggled a bit on this one...

 

So with the HMD as SOI then DMS Right Long is to Slave TGP to HMD. 

 

But it gets weird...

 

HMD SOI - Start of test range mission --> Use of DMS RL

I get the TGP dotted box that I can slew.  I can see the box move with the HMD as well as the the TGP.

 

HMD 01.gif

 

 

TGP SOI - Find and mark my target

 

HMD 02.gif

 

HMD 03.gif

 

HMD SOI - Use of DMS RL

Now I get just a diamond, the TGP is looking at MRK A and it is the SPI.  I can not slew the diamond.

 

HMD 04.gif

 

HMD SOI - Use of DMS RL then use of TMS UL

This will put another diamond down and it becomes the SPI.

 

HMD 05.gif

 

 

From this point on anytime I try to move the TGP with the HMD by using DMS RL it will just put down another diamond and make it SPI.  If I make the TGP SOI and slew it I can see the TGP image changing but the HMD does not reflect this and I have no idea where the TGP is actually looking.

 

One of the main utilities of the HMD just went down the toilet with some other stuff...

 

My question:

How do I get back to the mode where I just get the slewable dotted diamond box as in the first picture?

 

Caldera

Posted

Dotted box represents TGP field of view. In the first screen you're probably in Wide and zoomed out, then I can see, you're in Narrow and zoomed x4.

Look thru HMD on you target with TGP SOI and play with zoom and you'll see what I mean.

The diamond is the center of TGP field of view.

Posted

4- When HMD is SOI you cant slew the TGP aka diamond, you're slewing a HMD "marker" - thr cross bottom left of Mark A. If you press DMS RL (and one of the MFDs is TGP) it will slew TGP to the cross
5 - What do you mean by "another dimond"? There are no two dimonds.

I guess you didn't quite get the SPI and SOI idea of A-10C logic.

SOI - Sensor Of Intrest - it's the sensor you're manipulating using HOTAS commands
SPI - Sensors Point of Intrest - there is always one and only one SPI and it's marked by white "wedding cake"

On 4th screen the SPI is steerpoint - MRK A. On 5th screen SPI is the TGP.

Posted (edited)

It looks like you're zoomed too far in on the TGP:

  • Image 1 - zoomed out all the way, the dotted box shows TGP FOV
  • Image 2 & 3 - zoomed in all the way, the dotted box has collapsed on the diamond so it's no longer visible.  The TGP FOV is about a runway width, which would be appropriate.
  • Image 4 - Can't explain.  TGP is still looking at green diamond (with green square collapsed on it because it's zoomed in).  It is NOT looking at the markpoint--the SPI is on the markpoint, suggesting either your SPI is STPT, or HMCS is SOI + SPI and you just made a markpoint
  • Image 5 - Can't explain.  If HMCS is SOI, TMS right short should make a markpoint at the HDC, not the TGP diamond.  Suspect TGP is actually SOI

 

Didn't this thing about not seeing the TGP FOV because it's zoomed in too far come up before?  Also realize, if you're zoomed in all the way, if TGP is SOI and you try to slew, the diamond moves VERY slowly in the HMCS and HUD.  Zoom out and you'll see it slew faster

 

One other gotcha--DMS right long ALWAYS slaves the TGP to the HMCS EXCEPT when MAV is SOI.  It attempts to slave the MAV seeker to HMCS if possible, but does not slave the TGP.

 

Edited by jaylw314
Posted

Thanks guys,

 

This

It looks like you're zoomed too far in on the TGP

 

That was my problem.  I had the TGP zoomed in to max on Narrow.

 

Caldera

 

  • 3 months later...
Posted

You also don't need to make HMCS SOI in order to use your DMS right long to slew it to HMCS line of sight. Leave your TGP SOI and just use the HMCS to get it into an area and then look inside to slew it around and zoom in. In my experience jumping around between different sensors of interest unnecessarily gets you into a HOTAS PIO and everything gets harder than it has to be.

  • 3 years later...
Posted
On 1/4/2025 at 1:33 AM, lee1hy said:

looks like not working any more 
DMS right long not following HMD, 

Your MAV page is SOI.  DMS right long attempts to slave the Maverick seeker to HMD in that case

Posted
6 hours ago, jaylw314 said:

Your MAV page is SOI.  DMS right long attempts to slave the Maverick seeker to HMD in that case

DMS right hold is SOI agnostic, it should slave the HMCS even if the Maverick is SOI.

Posted
3 hours ago, ASAP said:

DMS right hold is SOI agnostic, it should slave the HMCS even if the Maverick is SOI.

According to the module manual, MAV is the only SOI that won't slave the TGP to HMCS line of sight, and will instead slave the Mav seeker to it.

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