short question about RIO NAV GRID heading

[caponi]

is the heading of the NAV GRID magnetic or true heading ?

in the docs i did not find any information about that ...

and what means "MB" in the right top corner ... in this case MB 90 ?

Edited September 5, 2022 by caponi

[Callsign JoNay]

4 hours ago, caponi said:

is the heading of the NAV GRID magnetic or true heading ?

in the docs i did not find any information about that ...

and what means "MB" in the right top corner ... in this case MB 90 ?

 

MB is the hooked contact's magnetic bearing from the YY. You can see that he's straight East of the converging point of the NAVGRID, so MB 90. And his range is 60.4 from the YY. Also notice to the left of the hooked contact 09B, the "09" being his bearing from the YY and the "B" representing his range somewhere between 50-100 nm. 

Most people in the DCS Tomcat community set the YY to the Bullseye, so you can use the NAVGRID for relatively accurate bullseye calls. In this case, Bulls 090 for 60.

Edited September 5, 2022 by Callsign JoNay

[caponi]

thank you very much for your explanation ...
and then i will show you why i ask and confusing me:

Have a look on first picture: this is my simple mission in Nevada ...
Blue F14 is 270 and Red L-39 is 090 from Bullseye .... TRUE heading !!
F10- and ME-Map are in true headings and the magvar for Nevada is -12 degree.

The same mission with a F-18: ( look at the top left corner, there is the BE-Call for TDC (and sorry, this cursor is not exactly 90°))
On second picture you can see a F-18 in a "true AC configuration" (HSI/Data/AC) --> 89°
in the third picture you can see a F-18 in a "magvar AC configuration" --> 77°

The values in the F-14 are the same as in the "TRUE" F18 config.

so, i ask me what heading is the F14 NAV GRID and why is the value "magnetic bearing" 090 instead of 078

if i have to call a new course for my Pilot i have to compute 090 - 12 to 078 ...
Thats the work of a RIO ?
Sorry, most of our F-18 pilot fly in mag config ...
 

something is wrong !
Maybe, my thoughts are wrong, but i will know what is right ....

Thx in advance

1.) Mission

 

2.) F-18 in TRUE HSI/DATA/AC configuration

3.) F-18 in magnetic HSI/FATA/AC configuration

 

[caponi]

Mission attached

and another screenshot:
MH 90(magnetic heading?) 
and have a look on BDHI ... 079

 

and if i gave a NAVGRID in magnetic 090, then the TGT contact is on the wrong position in this picture !!

 

remark on my tests earlier:
ICEMAN flew TRUE course 090 (instead of 078) to WP-1 and missed  (Menu ICEMAN/6/1)
so i gave him hold on MY course

F14-NAVGRID-090.miz

Edited September 6, 2022 by caponi

[Karon]

The TID has is True, it has always been <insert space meme>.

Simple test: get into a map with a noticeable MagVar (e.g. Nevada). Tell Iceman to fly North, and compare the heading he follows against the TID GS. Result: it won't fly straight up.

That label may be incorrect, it has happened already in the past. I remember spending a week over a similar issue in Jan 2021. The explanation Naquaii gave me back then is simple: the WCS does not know the magvar at the target's location. Therefore, it can only display the True value.

Thus, I have the feeling that the label here is simply incorrect, the NAVGRID shouldn't really matter, per se. I need a few more tests to check.

 

Slightly OT, one of the cool things you can do with WP SPD and HDG when play CAS, is indicating the Magnetic North on the TID, to simplify coordination. Just set the HDG as vM.

[caponi]

okay, i can live with NAV GRID in TRUE heading ...
i was confused about the terms MB "magnetic bearing" and MH "magnetic heading" ....

And yes, all my examples were recorded in Nevada

 

 

[The_Tau]

11 minutes ago, caponi said:

okay, i can live with NAV GRID in TRUE heading ...
i was confused about the terms MB "magnetic bearing" and MH "magnetic heading" ....

And yes, all my examples were recorded in Nevada

 

 

Well that MH in your screen is actually "TH" its just TID is reusing symbology to mean something else, like AL is not Altitude but Nav Grid size angle in your case 50 degrees

Edited September 6, 2022 by The_Tau

[Karon]

11 minutes ago, caponi said:

okay, i can live with NAV GRID in TRUE heading ...
i was confused about the terms MB "magnetic bearing" and MH "magnetic heading" ....

And yes, all my examples were recorded in Nevada
 

Careful, the NAVGRID is not True. In fact, you can orient it to offset and point at the Magnetic North, similarly to what I mentioned before with the Echo point. By doing so, although the reading won't be magnetic, the eyeballing you will make will be more precise.

[Cat107]

Actually, TID was displaying true bearing instead of magentic bearing in NAVRGID mode, this will be fixed in the next update

[Karon]

It took me a minute to figure out what you meant, then I noticed the typo (shy of two years later, nice). I'm not going to edit the post. It should have been:
> Careful, the NAVGRID is not True MAGNETIC. In fact, you can orient it to offset and point at the Magnetic North, similarly to what I mentioned before with the Echo point. By doing so, although the reading won't be magnetic, the eyeballing you will make will be more precise.

Otherwise the rest of the sentence does not make sense at all

@Cat107 Do you plan to add the magvar of the YY in the kneeboard if set in the ME?

[Cat107]

Nice idea, I'll add it to the list