Difference between MSL altitude and AGL altitude?

what is the different of MSL altitude and AGL altitude. can anyone please explain the difference?

thank you :D
please explain it :)

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MSL Altitude from Sea level
AGL from Ground level under you

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MSL- Mean Sea Level (Height above sea level)
AGL - Above ground level (height above ground)

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Thanks you so much!

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thank you so much! @CptNathanHope

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MSL remains constant when cruising
AGL fluctuates based on the terrain, unless it flies over the sea where it will be equal to the MSL.

Best you set that in your dock below so if you descend to 4000ft (MSL), you’ll see whether you’ll crash into terrain using the AGL indicator :)

Also if your flying in the Denver region use AGL because Denver is higher in sea level so if you at 1,000ft MSL you should be on the ground already.

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Since you edited your reply… AGL* ;)

Thanks for spotting that :D

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I use AGL under FL180 and MSL above FL180

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