"Altimeter 29.97"

ATC gives you that altimeter setting because that is what they are using for radar purposes for that particular area. Pressure can change greatly over a short distance, so your altimeter could read 100 feet off from what ATC sees you at, and in busy airspace areas like LA, you could bust Bravo if you're not careful.

This is how I always handle handoffs. Tune in the new frequency, and make the initial call. I usually say "SoCal Approach (or whoever it is), Cessna ***** with you, 4,500". They'll usually respond with "Roger, altimeter ****". At that point, acknowledge the pressure setting, and adjust your Kollsmann window.

Once you adjust your Kollsmann window and you are off of the altitude you said you were at (in this case 4,500), would you then make the climb/descent to match what you previously stated you were at now that your altimeter setting matches ATC's?
 
Once you adjust your Kollsmann window and you are off of the altitude you said you were at (in this case 4,500), would you then make the climb/descent to match what you previously stated you were at now that your altimeter setting matches ATC's?

Yes, I would.

Since I told ATC that I'm at 4,500, I need to be at 4,500 with their pressure setting. So, if my altimeter showed 4,600 after adjusting my Kollsman window to the given setting, I would need to to descend as soon as possible to 4,500. :)
 
Yes, you would.

Since I told ATC that I'm at 4,500, I need to be at 4,500 with their pressure setting. So, if my altimeter showed 4,600 after adjusting my Kollsman window to the given setting, I would need to to descend as soon as possible to 4,500. :)

Thank ya thank ya :crazy:
 
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