![](https://static.wixstatic.com/media/4f5214_1c71164be8c54d609b966af5f3dc9c08~mv2.jpg/v1/fill/w_288,h_288,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/4f5214_1c71164be8c54d609b966af5f3dc9c08~mv2.jpg)
VNAV
START VNAV
![vnav1.PNG](https://static.wixstatic.com/media/4f5214_7dbe4f69d8284a8dba697549db38b76c~mv2.png/v1/fill/w_62,h_35,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/vnav1_PNG.png)
Click on Utilities PANS OPS and select VNAV_LNAV and VNAV, and the WIZARD appears.
WIZARD
![wizard.PNG](https://static.wixstatic.com/media/4f5214_d903e5d120574ea593352e92a7bceb06~mv2.png/v1/fill/w_62,h_33,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/wizard_PNG.png)
Wizard is very easy to fill in, just enter the necessary data.
The distances are referred to the THR.
You can select CAT A, B, C or D.
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VNAV areas
![areas_VNAV.PNG](https://static.wixstatic.com/media/4f5214_44900be72a4744ba9718669ae8d8f454~mv2.png/v1/fill/w_62,h_35,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/areas_VNAV_PNG.png)
If you click Finish in the wizard The output tell you, you must click on THR and Opposite THR.
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After thar you get the VNAV in the workspace, with the message and also with the parameters.
OUTPUT
![areas_VNAV.PNG](https://static.wixstatic.com/media/4f5214_a922443261c44c0a805eab0ecd8a2018~mv2.png/v1/crop/x_67,y_0,w_1786,h_1080/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/areas_VNAV_PNG.png)
You can see the main parameters of VNAV in the output component
INFO
![info.PNG](https://static.wixstatic.com/media/4f5214_2ba8c543fdc04e029cf4b75870dc3d49~mv2.png/v1/crop/x_67,y_0,w_1786,h_1080/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/info_PNG.png)
If you select a plane from VNAV you can get the information about how that VNAV was built with the parameter and data input.
Analysis Obstacle
![vanv_eval.PNG](https://static.wixstatic.com/media/4f5214_e65a7fba62024a33974b78d4fa9bcd80~mv2.png/v1/crop/x_0,y_36,w_631,h_382/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/vanv_eval_PNG.png)
Click on
UTILITIES PANS OPS
OBSTACLE ANALYSIS
PANS OPS MAIN AREAS
Select
VNAV
and click next:
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the obstacle data wizard appears, you have to load obstacle data and click Finish.
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The output tell you select any plane from vnav with red circle and evaluation stars.
Analysis Obstacle
![eval.PNG](https://static.wixstatic.com/media/4f5214_6a623b78c68c40f9bf630dab1eff940b~mv2.png/v1/crop/x_64,y_0,w_1786,h_1080/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/eval_PNG.png)
It takes less than 2 minutes to analysis 200 m size cell from DEM (2,000,000 points) or
up to 10 minutes for 05 m size cell from DME (80,000,000 points)
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You get the critical obstacle with a red circle (in layer criticalObstacles) in the drawing and also get the main data in output.
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You can move the vertex / insert vertex of the areas to limit the area to analysis. Not CUT because information from VNAV is LOST.
Analysis Obstacle
![eval_output.PNG](https://static.wixstatic.com/media/4f5214_e614167fe954450e8d465c1c295ce5ea~mv2.png/v1/crop/x_144,y_0,w_1629,h_985/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/eval_output_PNG.png)
Also you get in the file of the analysis of the first 5000 or 10000 critical obstacle.
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Including OCA estimation for all CATs.
KML
![KML.PNG](https://static.wixstatic.com/media/4f5214_05f0bd26b1c843a587f1ff56903173d4~mv2.png/v1/crop/x_0,y_161,w_881,h_533/fill/w_61,h_37,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/KML_PNG.png)
As any area you can export that area to KML.
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First select all the oas area
then Click
Basic Operation
Transform to KML
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And you get the KML in the folder of KML of the program
My Files / Documents / AirNavCAD / KML
VIDEO 4 VNAV / LNAV