TACAN Distance Error?

[SharpeXB]

Something is wrong here

The HUD shows Kobuleti to be 59.3 miles away when it's only about 15

Track File here

https://www.dropbox.com/sh/h090mbb54jl4u81/AACaZt4m6q3c8Q-WyW1GBuSwa?dl=0

 

Edited January 16 by SharpeXB

[rob10]

See this thread in BUGS section.  Short version of workaround is turn TCN off then back on and it should be fine again.

 

[Valtime]

Had the same problem during serpent’s head 2 campaign (the mission you rescue the chopper crew), just like you it seemed. 
flying to kobuleti the distance froze at 44 NM and the TACAN station on the HSI kept moving forward as I was flying towards it...

[HILOK]

yep, having the same issue regularly, when playing liberation campaign in PG on the way back to the carrier. off-on toggle resolves it.

[imacken]

Guys, as rob10 says, it has already been reported some time ago.  For the moment, switch it off and on when that issue occurs.

[dburne]

Yep happens to me fairly regular also, and I do the same switch off and back on usually resolves it.

Occasionally it does not and I have to clear it out and re-enter the data for it.

Edited January 17 by dburne

[johnmjones1975]

I'm confused where on an MP server I play on

the Tacan shows the heading for the tanker

but i get no range information

 

I've never seen that before

is there a setting in ME or something?

 

works fine for the carrier or any other tacan,

I just don't get range on tankers.

I am in transmit/receive mode also.

[Razor18]

I encountered this once, it turned out it was another TACAN within range, on the same channel, interfering. Might be different in this case, but worth looking at nonetheless...

[Bunny Clark]

1 hour ago, johnmjones1975 said:

I'm confused where on an MP server I play on

the Tacan shows the heading for the tanker

but i get no range information

 

I've never seen that before

is there a setting in ME or something?

 

works fine for the carrier or any other tacan,

I just don't get range on tankers.

I am in transmit/receive mode also.

When setting a TACAN channel for an aircraft you need to be in A/A mode, not T/R. 

[Razor18]

RIght, I was referring to earlier post here about land based TACANs. Should have quoted the post to be specific.

[Jagohu]

Have a look at this post, it might explain a thing or two.

Also:
 

Quote

 

Because the upper antenna filter is fixed, it filters A/A TACAN frequencies on channels 1-36 and 64-99 (X and Y). A/A TACAN channels should be chosen outside of these ranges.

The upper filter makes the top antenna unusable for T/R (Air to Ground) TACAN channels 1-29 X and Y, 47X to 63X and 64Y to 92Y. For TACAN channels in these ranges, the bottom antenna is the only antenna for TACAN. [This] causes reduced ranges for DME at channels within the range of the filter when flying directly away from the TACAN station.

 

The trick to know here is that when you set a TACAN channel, you’re actually setting two different frequencies: a transmit frequency specific to that channel and a receive frequency that’s 63 MHz higher. TACAN channels are spaced by 1 MHz between channels, so setting a radio to a channel 63 higher than the transmitting aircraft (77X in our example) will mean you’re tuned to that’s aircraft TACAN transmissions. This is why the transmitting aircraft should be a channel between 1 and 63, so the receivers can tune to 64-126. The channel selected needs to be the same X or Y, as these represent completely different frequency sets, and the same TACAN mode (A/A T/R) needs to be selected to enable range calculation.

Ie. Transmitter AA 38X – XMIT 1062 MHz, RCV 999 MHz; Receiver 101Y XMIT 1125MHz, RCV 1062MHz