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AHRS/GPS System in Nevada!? No western coordinates?!


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Posted

Hello,

wanted to fly in Nevada and created mission at Creech AFB cold start.

During AHRS/GPS System alignment and present position data output, the longitude has no values.

Manual data entry is only possible for eastern values. Is this by design of the NAV system?

How can we use the system in western hemisphere? Anyone tried this yet?

Screen_221105_165857_Nevada_nav.jpg?raw= Screen_221105_170117_nevada_nav_pres_pos Screen_221105_170154_nav_nellis_data.jpg

Thanks

Jens

  • Like 1
Posted (edited)

You can enter Western Longitudes. To do so first Select the Key next to the the Longitude entry. BEFORE typing any values press the CLR key , the Longitude identifier will change to "W", then enter the digits. Same procedure for Southerly Latitudes.

MB339cdu.jpg

If you try to do a MANUAL IP entry using this procedure for alignment you need to be quick, as the system jumps into alignment even if you have not finished entry a valid start Lat/Long.

EDIT: after some more reading the jumping into alignment mode automatically is normal and occurs as soon as the system gets valid GPS data. then uses GPS position to align. .... I guess the only time you need to use Manual or last stored position is if you don't have GPS.

Regardless once aligned the STEER function works as intended, Select STEER then say Airport Rng and Brg displayed are correct and work in flight.

Though calling up a SB waypoint to see its Lat and Long doesn't provide any values.

Edited by IvanK
  • Thanks 1
Posted

Thanks @IvanK for the explanation, haven't found it in the manual or wasn't paying enough attention.

For navigation, I noticed this yesterday. Info on HSI and data display where correct for ME preset waypoints.

One thing I noticed, the landing waypoint from ME isn't part of the preset flightplan, is this intended?

Also bearing and range will only be displayed on the NAV unit itself, but not on RDU? Would be nice to have ranging info to airport on RDU, when HSI is in ILS mode.

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