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Using Airspace OMS to analysis VFR Traffic Pattern Airspace

 VFR Report

During each analysis of a proposed structure Airspace will produce a VFR - Traffic Pattern Airspace Report. The reports will feature analysis of each airport under review using the default criteria:

  1. Horizontal Surface
  2. A maximum of "4" aircraft of similar category in the traffic pattern at one time
 Airspace OMS VFR Report applies all FAR requirements  

The following imaginary surfaces will be analyzed:

  1. FAR Part 77.23(a)(1)
  2. FAR Part 77.23(a)(2)
  3. FAR Part 77.25(a)
  4. FAR Part 77.25(b)
  5. FAR Part 77.25(d)
  6. FAR Part 77.25(e)
 Airspace OMS Climb/Decent Area requirements  

In addition, the Climb/Decent Area and the area between the runway ends will also be analyzed.

The example below was the result of an analysis of the following Airspace Study"

Latitude 30 - 17' - 04.36"
Longitude 81 - 47' - 57.00"
   
Site Elevation AMSL 87 ft
   
Structure Height 151 ft
Overall Height AMSL 238 ft
 VFR Traffic Pattern Analysis Report  

VFR Sample Report using Airspace OMS
(Click on Image to View Full Size)

 Using TERPS Professional to view VFR Traffic Pattern Airspace

If changes are necessary to either the category of aircraft or the number of similar category in the traffic pattern it will be necessary to do the analysis under TERPS. Pictured below is the analysis of TERPS on the same study point as shown above.

VFR Traffic Pattern Airspace using TERPS Professional
(Click on Image to View Full Size)

 Knowing the Rules

Remember when conducting a VFR - Traffic Pattern Airspace Analysis, a structure that exceed any of the following maximum allowable heights is considered to constitute a hazard to air navigation:

(1)The height of the transition surface (other than abeam the runway), the approach slope, the horizontal surface, and the conical surface (as applied to visual approach runways).

(2) Beyond the lateral limits of the conical surface and in the climb/descent area - 350' above airport elevation or the height of part 77.23(a)(2), whichever is greater not to exceed 500' above ground level (AGL). The climb/descent area begins abeam the runway threshold being used and is the area where the pilot is either  descending to land on the runway or climbing to pattern altitude after departure.

(3) Beyond the lateral limits of the conical surface and NOT in the climb/descent area of any runway - 500' above Airport Elevation not to exceed 500' AGL.