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Questions about aircraft navigation systems using radio signals, such as VOR and NDB.

8 votes
1 answer
487 views

What is Automatic Radial Centering on a VOR indicator?

As the title says - some steam VOR indicators got an ARC indicator lamp. According to the POH of an aircraft featuring such a VOR indicator this means Automatic Radial Centering. What is that ? I coul …
TheEagle's user avatar
  • 1,404
7 votes
2 answers
324 views

Does the radial needle of a HSI automatically deflect to the correct position when tuning th...

At least on small aircraft, the HSI is slaved to the NAV1 radio. The NAV1 radial is selected with a small knob of the HSI. Now, when I want to fly an ILS approach I don't need to set a radial myself a …
TheEagle's user avatar
  • 1,404
5 votes
1 answer
384 views

How do you calculate the deviation from an RNAV waypoint radial?

As a clarification at the beginning: I'm talking about non-GPS, pure VOR-DME based RNAV devices here. On RNAV devices that use just the selected VOR-DME, not GPS, the phantom radio station is set up b …
TheEagle's user avatar
  • 1,404
5 votes
1 answer
672 views

What does a DME indicator do in HOLD or RNAV mode?

I found this DME indicator on the Cessna 210. Its mode switch has four positions - NAV1, NAV2, RNAV and HOLD. NAV1 and 2 are clear - it uses the NAV1 and 2 freq respectively. I'm wondering what the ot …
TheEagle's user avatar
  • 1,404