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[CANNOT REPRODUCE, MISSING TRACK] SA map display goes dark above 35,000 and higher


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SA map display goes dark above 35,000 and higher.

 

Is this normal?

 

I am guessing that NAV is like A10 embedded GPS Inertial. NAV system mode is NAV. Good spin up.

 

Also according to training mission, it takes 3 minutes to align Nav. But I get .5 OK after 30 seconds. All options are set to realistic. NAV requires alignment.

 

So following by-book start, port(left) engine is started after Nav system is set to Algn. By the time port motor is at 60, canopy down, belts tightened, and EJECT armed. Time around 45-1 minute , the system is aligned and ready to be put into NAV mode.

 

In A-10C that OK is .8

In AV-8B OK is .7

F/A-18C Lot 20 OK is .5

 

What does that decimal mean. Accuracy to .5 nm at 60 minutes of flight? I figure it must a relationship between distance and time. After 60 minutes of flight aircraft would be .5 nm of what pos is shown in HSI and SA Map. Is that correct interpretation.

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