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"msa XYZ Vor"  
User currently offlineGoboeing From United States of America, joined Jun 2000, 2716 posts, RR: 15
Posted (13 years 5 months 2 weeks 3 hours ago) and read 1466 times:

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

3 replies: All unread, jump to last
 
User currently offlineN400QX From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 5 months 2 weeks 2 hours ago) and read 1452 times:

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.

User currently offlineCYLW From Canada, joined Apr 2000, 438 posts, RR: 0
Reply 2, posted (13 years 5 months 1 week 6 days 23 hours ago) and read 1448 times:

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


User currently offlineGoboeing From United States of America, joined Jun 2000, 2716 posts, RR: 15
Reply 3, posted (13 years 5 months 1 week 6 days 8 hours ago) and read 1436 times:

Thanks. Now I get it.
Nick


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