What is AGL and MSl ???

[Dragonfly]

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

[C]

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!

[RichD]

Hope this helps

[Fozzer]

Give these a try...>>>

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

..and some more...>>> http://en.wikipedia.org/wiki/List_of_av ... reviations

Paul... ...!

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

[C]

RichD:

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

[C]

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

Unless you're upside down.

[DaveSims]

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.   :D

[Fozzer]

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

Unless you're upside down.

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.... ...!

Paul... ... ...!

[RichD]

C

If only the land had been drawn using green,

The cows stripped the grass, 

[Dragonfly]

Thanks for the info. every one.

[ratdog]

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.

[Fozzer]

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... ...!