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The POS SHIFT page shows the bearing & distance of other systems The FMC position shouldīe closely monitored if IRS NAV ONLY is in use for long periods. Monitoring when a radio position was available. Position based on the IRS position error as found during previous When radio updating is not available, an IRS NAV If GPS is not available, FMC position is biased approximately 80:20 toward radio
#Uk air navigation update
Navaids being used for navigation (ie radio position) are highlighted (here WTM & OTR).įMC Position: FMC navigational computations & LNAV are based upon this.įirst priority for FMC position updates, it will even position update on the The NAV STATUS page shows the current status of the navaids being tuned. Range and geometry or from DME/VOR or even DME/LOC. Position is found from either a pair of DME stations that have the best
#Uk air navigation series
Series 500 aircraft have anĮxtra dedicated DME interogator (hidden) for this purpose and NG's have two. Selected to AUTO (happens automatically on NG), thus allowing the FMC to select the optimum DME or VOR
![uk air navigation uk air navigation](https://vhx.imgix.net/icaotv1/assets/caad065b-15e0-49ab-80ec-254a6ca17c1e-5c6dff9c.png)
Best results are achieved with both Nav boxes This practically eliminates the need to enter aĪutomatically by the FMC. Position update accurately on the ground, eg if no stand position isĮntered in POS INIT. GPS L & GPS R Position: (NG only) The FMC uses GPS positionĪs first priority for FMC position updates. Is important to set the IRS position accurately in POS Updating of either IRS positions from any external sources. After the alignment process is complete, there is no Slightly during the course of the flight. They can all be seen on the POS REF page of the FMC.Ĭomputes its own position independently consequently they will diverge The aircraft has several nav positions, many of which are in use simultaneously!
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