Coordinate imput

[JG300_Papaye]

Hi,

I have a question for coordinate input :

We don't insert E or W and N or S in REF LO/LA. How the system know that the coordinate that I insert are the good.

 

For example :

For W 115°45'24" I insert 1154524 but i don't insert W. How the system know if is E or W?

Is it a coding choose in the module? In the aircraft how did the pilot managed with this issus?

 

Thanks

[renhanxue]

In reality, you would not be able to use the navigational computer at all in most of the areas on the maps currently available or announced for DCS (the exceptions being the western half of Caucasus and the small part of Normandy that lies east of Greenwich). The reason for this is that on the real nav computer, you can enter the longitude and latitude in any order, and it'll autodetect which is which. It can do this because it comes programmed with the restriction that longitude must be greater than 0° but smaller than 40°, while latitude must be greater than 40° but smaller than 90°. If you're east of Sochi-Adler, west of Greenwhich or south of Madrid, you better have brought a paper map and your dead reckoning A-game, because the computer is completely useless to you.

 

Not that you would have been entering latitude/longitude manually all that often in reality though, the computer came preprogrammed with plenty of common Swedish landmarks and airfields accessed via the REF codes. They're input via the same entry mode on the data panel as the lat/lon coordinates (REF/LOLA, remember?) so that's why the seemingly pointless latitude restriction of 90° is there - the computer knows you're inputting a REF code rather than a coordinate if the first digit is a 9. On the JA 37 I think they reduced the max latitude to 85° to make room for more preprogrammed points, though.

[Holton181]

In the aircraft how did the pilot managed with this issus?

Just to give a short version of what was said above:

The Viggen was developed for use within, and in the proximity outside, the Swedish borders and never intended for export.

[Bananabrai]

Many thanks for the explanation of the real system. Very interesting.

Did't know that it was that "limited".

 

@ Windu65, to answer your question in regards to the DCS AJS37:

How does the system know, wether inserted numbers are east, west, north or south?

 

Simple, you need to enter the East/West coordinates first, all 6 digits (even if the last is a zero), and then you enter N/S coordinates.

 

For the NTTR map, you need to disregard the 100°. Do not input 1154524 like you have written in your post.

You basically need to put in 15°45'24"

 

After you have input the 6 digits of the E/W, display jumps to all zero again and then you put in N/S digits.

 

So its a coding choise, it would not work for a global map, and we will maype sometime see how they make it work on a map which is around 100°E or W, if we ever get one.

 

And if the Marianas Map reaches for Midway, that'll get interesesteng.

Though I guess the Viggens legs are too short to reach that when taking off of the Marianas...

[QuiGon]

In reality, you would not be able to use the navigational computer at all in most of the areas on the maps currently available or announced for DCS (the exceptions being the western half of Caucasus and the small part of Normandy that lies east of Greenwich). The reason for this is that on the real nav computer, you can enter the longitude and latitude in any order, and it'll autodetect which is which. It can do this because it comes programmed with the restriction that longitude must be greater than 0° but smaller than 40°, while latitude must be greater than 40° but smaller than 90°. If you're east of Sochi-Adler, west of Greenwhich or south of Madrid, you better have brought a paper map and your dead reckoning A-game, because the computer is completely useless to you.

 

Not that you would have been entering latitude/longitude manually all that often in reality though, the computer came preprogrammed with plenty of common Swedish landmarks and airfields accessed via the REF codes. They're input via the same entry mode on the data panel as the lat/lon coordinates (REF/LOLA, remember?) so that's why the seemingly pointless latitude restriction of 90° is there - the computer knows you're inputting a REF code rather than a coordinate if the first digit is a 9. On the JA 37 I think they reduced the max latitude to 85° to make room for more preprogrammed points, though.

Interesting, I was aware of the °-restrictions, but I didn't know you could enter either coordinate first IRL. I always thought you had to enter the E/W coordinate first IRL too. :thumbup:

[JG300_Papaye]

In reality, you would not be able to use the navigational computer at all in most of the areas on the maps currently available or announced for DCS (the exceptions being the western half of Caucasus and the small part of Normandy that lies east of Greenwich). The reason for this is that on the real nav computer, you can enter the longitude and latitude in any order, and it'll autodetect which is which. It can do this because it comes programmed with the restriction that longitude must be greater than 0° but smaller than 40°, while latitude must be greater than 40° but smaller than 90°. If you're east of Sochi-Adler, west of Greenwhich or south of Madrid, you better have brought a paper map and your dead reckoning A-game, because the computer is completely useless to you.

 

Not that you would have been entering latitude/longitude manually all that often in reality though, the computer came preprogrammed with plenty of common Swedish landmarks and airfields accessed via the REF codes. They're input via the same entry mode on the data panel as the lat/lon coordinates (REF/LOLA, remember?) so that's why the seemingly pointless latitude restriction of 90° is there - the computer knows you're inputting a REF code rather than a coordinate if the first digit is a 9. On the JA 37 I think they reduced the max latitude to 85° to make room for more preprogrammed points, though.

 

Thanks a lot for that explanation.

 

And thanks for the Nevada, i'll try that.

[Quip]

The system is the one developped for the Harpoon (originally for the oh-so-naughty