Updating LS with the correct info, is that even possible?

[Quip]

So I have a question.

 

When you first start and you get near the runway you switch from BER to NAV. This sets the navigation system in "update" mode, so when you start your takeoff run (within 2 minutes), the INS is updated as you roll down the runway. This does a fix to the Lat/lon of the runway to setup the INS and also adds the magnetic variation.

If your heading as you start rolling is off by more than 15 degrees the system will assume you're on the opposing runway and try to do a navigational initiation for that heading.

Or you can press the Reference button. But the limitations are the same.

 

Also, once you land, if you want to takeoff again, you switch to BER and LS and back to NAV to reset the HUD to its Takeoff mode (with the VRot speed and climbout symbology)

 

(you can also set a different runway heading before rolling in BANA/IN, but that's not the point here)

 

 

So far so good.

 

But now the question.

If you now land on a roadbase (or a different airbase), and want to takeoff, again, the heading will no longer be correct, and even more importantly, the Lat/Lon for that runways center point. So you end up with a NavSyst error.

 

 

I would have imagined that the way around this would have been to enter the new starting point as LS. For an airfield this is pretty simple, just enter the airport code as REF and you should be fine.

 

 

 

And for a road base, I thought you should be able to enter the correct Lat/lon to LOLA and the road's heading to BANA.

 

 

But I can't seem to do this.

I'm not able to enter a LOLA for LS. So anytime I want to takeoff from a road my navigational system ends up with an error NavSyst.

 

 

Have I missunderstood something or is this something that hasn't been implemented correctly?

And I know I can takeoff without doing the BER-LS-NAV-ballet which eliminiates the NavSyst error (since no Nav update is attempted), but I do like to takeoff in takeoff mode... :)

[corvinus]

For road landings I usually input the landing location and heading. If you, after landing, you switch to BER and then NAV, it automatically selects the correct heading.

 

 

 

When I do not enter the L1 coordinates, I enter the runway heading after landing:

* BANA/GRANS IN

* enter heading (four digits, i.e. 88o enters as 0880)

* press LS

* switch NAV->BER->NAV

 

 

Does this work for you?

[Quip]

I can enter BANA, but not LOLA for the new T/O location...

[corvinus]

I also did not succeed in entering the take-off position, but ... entering the run-way heading (and selecting the LS waypoint), does get rid off the NAV.SYST. warning.

[Quip]

Excellent, thanks! Odd, but thanks :)

[corvinus]

:thumbup: