Simviation Forum - What is AGL and MSl ???

Aug 29^th, 2012 at 2:03pm

Dragonfly Offline
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Live Oak, Florida

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Posts: 20

in the flight School you talk a bought AGL and MSl what do's that mean?? Huh

"She Climbs like a home sick Angel"

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Reply #1 - Aug 29^th, 2012 at 2:22pm

C Offline
Colonel
Earth

Posts: 13144

You'll find them referring to heights/altitude.

AGL = Above Ground Level (for example an obstacle 200ft tall will be 200ft AGL)

MSL = Mean Sea Level (now, if your same obstacle is on a piece of ground that has an elevation of 150ft above mean sea level (AMSL), then your obstacle will be a total of 350ft AMSL).

If I had a whiteboard I'd draw you a diagram! Grin

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Reply #2 - Aug 29^th, 2012 at 3:38pm

RichD Offline
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I Like Flight Simulation!
Hereford, UK, EGBS

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Hope this helps

Wink

If you find yourself falling off a cliff, you might as well try to fly.......What have you got to lose?

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Reply #3 - Aug 29^th, 2012 at 4:38pm

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

Give these a try...>>>

http://gozips.uakron.edu/~evert/airabr.htm

..and some more...>>> http://en.wikipedia.org/wiki/List_of_aviation,_aerospace_and_aeronautical_abbrev...

Paul...

...!

I love my Radar Altimeter (RALT)...tells me how far I am from the dangerous stuff down below!

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Reply #4 - Aug 29^th, 2012 at 6:12pm

C Offline
Colonel
Earth

Posts: 13144

RichD:

Nice one! Just what I threatened. If only the land had been drawn using green, the diagram would have been perfect! Grin

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Reply #5 - Aug 29^th, 2012 at 6:14pm

C Offline
Colonel
Earth

Posts: 13144

Fozzer wrote on Aug 29^th, 2012 at 4:38pm:

I love my Radar Altimeter (RALT)...tells me how far I am from the dangerous stuff down below!

Unless you're upside down. Tongue

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Reply #6 - Aug 29^th, 2012 at 9:56pm

DaveSims Offline
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Clear Lake, Iowa

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I remember the lesson my first instructor taught me on AGL and MSL and the heights shown on the map for towers. The big number is MSL, and is the height your altimeter will show when you hit the top of the tower. The smaller number is AGL, which is how far you will fall after you hit the tower.

Gotta love those ole timer instructors and the lessons they teach. Cheesy

Dave

www.flymcw.com

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Reply #7 - Aug 30^th, 2012 at 6:22am

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

C wrote on Aug 29^th, 2012 at 6:14pm:

Fozzer wrote on Aug 29^th, 2012 at 4:38pm:

I love my Radar Altimeter (RALT)...tells me how far I am from the dangerous stuff down below!

Unless you're upside down. Tongue

For that event I use a long piece of string (Plumb Bob) marked in Feet, with a weight on the end, and dangle it out of the Cockpit whilst upside-down.

When I can observe the weight very close-up, I estimate that I am much too close to the ground!

Look out for the the forthcoming AAIB report.... Wink

...!

Paul... Grin

...

...!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.

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Reply #8 - Aug 30^th, 2012 at 10:42am

RichD Offline
Colonel
I Like Flight Simulation!
Hereford, UK, EGBS

Gender:
Posts: 40

C

Quote:

If only the land had been drawn using green,

The cows stripped the grass, Grin

If you find yourself falling off a cliff, you might as well try to fly.......What have you got to lose?

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Reply #9 - Aug 31^st, 2012 at 1:29pm

Dragonfly Offline
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Live Oak, Florida

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Thanks for the info. every one. Cheesy

"She Climbs like a home sick Angel"

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Reply #10 - Jan 14^th, 2013 at 3:01am

ratdog Offline
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I Love Simviation.
DFW Texas

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I like using AGL. It tells you exactly what terrian you are flying over. If you are flying low say on a pop up bomb run in a F-15E you can see in your hud the way the terrain is by watching your AGL go up and down as you fly across hill tops and over valleys. Nothing like trying to dodge those SAMs on your ingress to a target.

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Reply #11 - Jan 14^th, 2013 at 4:34am

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

I always install a Radar Altimeter, Digital or Analogue, in all all my favourite aircraft.
Its always nice to know just how far I am, safely, from the ground, or water, down below!

Paul....FS 2004 + FS Panel Studio... Wink

...!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.

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