goboeing
Posts: 2429
Joined: Mon Jun 05, 2000 5:31 am

"msa XYZ Vor"

Wed Jun 20, 2001 10:02 am

Please take a look at this to understand my question:
http://edj.net/cgi-bin/echoplate.pl?SouthWest/LAX_ir25R.GIF
In the lower right hand corner of the approach chart for LAX RWY 25R, there's a circle that says around it MSA LAX VOR 25nm. In the center is the symbol for a VOR station, and then it's divided into 3 sections, each with a box with an altitude in it and radials as dividers. What I want to know is what this whole circle thing means. I've seen it on all the charts I've looked at, and it's the only thing I don't understand. Thanks to anyone who can answer this.
Nick
 
N400QX
Posts: 1981
Joined: Sun May 06, 2001 9:51 am

RE: "msa XYZ Vor"

Wed Jun 20, 2001 11:31 am

MSA stands for 'minimum safe altitude' in a 25 nm radius of the LAX VOR. In the example you cited, the MSA between the LAX 165 and 270 radials is 7700. Between the LAX R-270 and R-050 is 2900.
 
cylw
Posts: 408
Joined: Sun Apr 09, 2000 2:34 pm

RE: "msa XYZ Vor"

Wed Jun 20, 2001 1:57 pm

Some MSAs are off NDBs too. Like this one. This one also doesn't have separate sections indicating that the land is pretty flat 25nm around this NDB.

http://edj.net/cgi-bin/echoplate.pl?EastCentral/CLE_ir23L.GIF
 
goboeing
Posts: 2429
Joined: Mon Jun 05, 2000 5:31 am

RE: "msa XYZ Vor"

Thu Jun 21, 2001 5:26 am

Thanks. Now I get it.
Nick

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