Navigstion System Questions

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dwest185
Posts: 10
Joined: Thu Nov 03, 2016 11:45 pm
Navigstion System Questions

Post by dwest185 » Mon Jan 07, 2019 8:13 pm

Sorry to have yet another question/issue but I'm using FSX@War and when I select a target I use the Lat and Lon coordinates it gives for the target; these coordinates are 10 digit I think, but definitely longer than what the navigation computer accepts. I watched the tutorial video on INS/NAV and I understand you round the numbers. So if I'm rounding numbers and my Longitude is 73.78563 for example, I would only be able to put 73.5 or 74.0 so how is that accurate? Am I missing something when I do this because I'm always off course by several degrees and miles from the intended target; any suggestions?

dwest185
Posts: 10
Joined: Thu Nov 03, 2016 11:45 pm
Re: Navigstion System Questions

Post by dwest185 » Tue Jan 08, 2019 1:54 am

So I had a hunch that the 8 digit coordinates were the issue. Turns out there’s a difference between 4 and 8 digits and you can’t just round 8 down to 4 digits. Now my question is how to convert the 8 digits to 4 digits so I can reference targets in FSX@War

UPDATE:

I finally figured out the issue. I’m posting this in case someone else has the same problem. FSX@War uses the Lat/Lon in decimals. The Nav Computer in the F-4 uses Degrees Minutes Seconds format so you need to convert those coordinates before entering. You can use this website for that purpose: https://www.latlong.net/lat-long-dms.html

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: Navigstion System Questions

Post by JonathanBleeker » Tue Jan 08, 2019 6:42 am

Actually the lat/lon formats used are degrees minutes decimal minutes. 73.78563 will therefore be 73° 47.1378'.

In the F-4, you can count the number of clicks to get the right decimal point. It allows an accuracy to 0.1 minutes, so 10 clicks between each minute.

dwest185
Posts: 10
Joined: Thu Nov 03, 2016 11:45 pm
Re: Navigstion System Questions

Post by dwest185 » Tue Jan 08, 2019 12:23 pm

JonathanBleeker wrote:
Tue Jan 08, 2019 6:42 am
Actually the lat/lon formats used are degrees minutes decimal minutes. 73.78563 will therefore be 73° 47.1378'.

In the F-4, you can count the number of clicks to get the right decimal point. It allows an accuracy to 0.1 minutes, so 10 clicks between each minute.
Interesting, how did you convert 73.78563 to 73 47.138'? I'm not sure what you mean by counting the clicks? I assume if I count the clicks on the knob, from .00 I count 10 clicks and the read out will be .10; however I need 73.78, but how did you get .47 from .78?

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: Navigstion System Questions

Post by JonathanBleeker » Tue Jan 08, 2019 2:16 pm

Take the decimal portion and multiply by 60 (60 minutes in a degree). 0.78563 * 60 = 47.1378.

So what you will want to do is get the lat to indicate 7847 perfectly, then count 1 click on the knob to get 7847.1.

dwest185
Posts: 10
Joined: Thu Nov 03, 2016 11:45 pm
Re: Navigstion System Questions

Post by dwest185 » Tue Jan 08, 2019 2:36 pm

JonathanBleeker wrote:
Tue Jan 08, 2019 2:16 pm
Take the decimal portion and multiply by 60 (60 minutes in a degree). 0.78563 * 60 = 47.1378.

So what you will want to do is get the lat to indicate 7847 perfectly, then count 1 click on the knob to get 7847.1.
Awesome, thanks Jonathon.


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