altimeter setting

[Be200pilot]

You are flying along at fl350 when you lose all com radios. you know that an approach is required at your destination/alternate and everywhere else within fuel range. Your going to have to descend sooner or later but how do you get the correct altimeter setting??? You obviously need it below 18 and 29.92 could be way off from actual setting. comments....

 

[ERJdca]

dont you have any paperwork onboard as far as weather???? THose things called metars

 

[ERJdca]

as long as your nav's are working i would also assume that you could listen to a asos/awos over a vor through your speaker?

 

[CitationLover]

do you have a radar altimeter?

 

[The FNG]

Go with forecast then cross-check your glide slope altitiude crossing the marker and correct as necessary.

 

[jergar999]

That's a good one, FNG, I never thought of that.

 

[spngbobsqrpilot]

ok, getting creative here....

Use the "below" mode on your TCAS while still in the FLs or even descending through 180, see how many hundred feet your altimeter is off based on the a/c below. If you are going into a busy airport, you can compare your variance to a/c ahead.

Looking at METARS?? Don't know how much I would want to trust hours old data. I've seen .75" increase in pressure in 30 minutes. So depending on where you are, I'd guess you could see a rapid decrease as well.

 

[xjcaptain]

If you have weather radar on board, you can easily determine altitude +- a few hundred feet which will be close enough until you get down within the operating window of the radar altimiter (if you have one), otherwise the weather radar alone will give you a pretty close estimate. (This is good to know with an altimiter failure, and not only when you're just unable to get an altimiter setting).

 

[avbug]

Open a window, toss out a brick, and count the seconds until it strikes something expensive. Then calculate the altitude, and set your altimeter accordingly. Don't any of you read the AIM?

 

[spngbobsqrpilot]

would that brick be Mode C equipped?