What is "present position area" in position /cdu

[bloomstomb]

Im looking at the present position / eastings /northings line.

 

It says MP 21500 04800

 

Mp= present position

Eastings = 21500

Northings= 04800

 

 

What is MP? What does it stand for?

 

Thank you..

[Speed]

MP = a MGRS square identifier within the larger UTM grid identifier. A UTM grid, which is a retangular-ish square of the earth's surface, is broken down into 100kmX100km squares within the MGRS system. Each square has a two-letter identifier. The easting and northing are the coordinates, from the south-west corner (the "origin", so to speak), in meters.

 

21500 = 21,500 meters east of the origin of the square (SW corner)

04800 = 4,800 meters north of hte origin of the square (SW corner)

 

The UTM grid identifier is often omitted because grids are very large. There are only two UTM grids on the entire Black Sea/Caucusses map, 37T and 38T.

 

A full MGRS grid would be given such as

 

38T KM3845039860

 

That's a 10 digit grid. Any even number of digits less than or equal to 10 can be given though, such as

 

38T KM3840

which is a four digit grid, taken to mean:

38T KM 38000 40000

[Zenra]

It's the grid you are in. MP is just east of Nal'Chik...

[bloomstomb]

Is there a place I can see this map with the grid lettering and numbering on it?

 

Thank you for the detailed response!

Edited May 6, 2011 by bloomstomb

[bloomstomb]

It's the grid you are in. MP is just east of Nal'Chik...

 

OK how do you know this? Where do you see MP on the map?

[Zenra]

Yes- download the TC-1 map from the Downloads | Documentation section on the DCS home page.

[bloomstomb]

OK thanks. I can see the utm grid that I am in, but just a small correction, not every utm grid is 100km x 100km. For some reason there are utm grids that are different sizes (eastings are somewhat variable, being 40000m , 60,000m and 100,000m,

Northings are pretty uniform from what I can see , they are all 100,000m

 

 

Not sure why its not unifor but im sure theres a reason.

 

Thanks for the replies guys , one more hurdle out of the way.

[johnv2pt0]

Earth is a sphere (nearly anyway :)

[bloomstomb]

Earth is a sphere (nearly anyway :)

 

Hmm yeh that makes sense. They couldnt cut the grids perfectly because earths shape is not perfect.

 

 

One other questions, I have a D5/B1 top right corner of position info. I have been trying to figure out what this means and no luck. Any idea?

Edited May 6, 2011 by bloomstomb

[WarriorX]

Hmm yeh that makes sense. They couldnt cut the grids perfectly because earths shape is not perfect.

 

 

One other questions, I have a D5/B1 top left corner of position info. I have been trying to figure out what this means and no luck. Any idea?

 

I think that refers to the "Figure of Merit"

 

Figure of Merit or FOM referres to the accuracy of the system in question. It is a numerical value assigned to show the pilot the level of accuracy of the system.

 

FOM's can be seen for the DTS, EGI, and GPS systems.

 

Do a search of the Flight Manual for "Figure of Merit" for more information.

Edited May 6, 2011 by WarriorX

[bloomstomb]

Yup I did a search on FOM earlier. The guide is very vague on what FOM really means. So , what does the d5/b1 in the top right corner mean exactly? If FOM simply means the scale of accuracy, how accurate is d5/b1 on this scale?

 

 

Also , my undertanding is that FOM scale is from 1-9, so I have my doubts that this d5/b1 could indeed be FOM.

 

 

Checking out this thread on the subject atm

 

http://forums.eagle.ru/showthread.php?t=71637&highlight=fom

Edited May 6, 2011 by bloomstomb

[WarriorX]

Do a search again...look at page 173, and 184 of the Flight Manual, it will give some more details.

 

Specifically EGI, GPS, and EGI Blended FOM

 

The D is for the DTS FOM, the B is for the EGI in Blended mode.