Create Aviation Communication, Navigational, and Surveillance surfaces

Available with Aviation Airports license.

To identify whether buildings cause unacceptable interference to facilities, an international standard has been created to describe the parameters that are used to construct imaginary surfaces around these facilities. The Communication Navigational Surveillance Surfaces tool allows users to create these surfaces in accordance with ICAO EUR DOC 015.

Omni-directional facilities

The following table reflects omni-directional facilities:

Specification	Classification	First cylinder radius	Cone radius	Cone angle	Second cylinder radius	Second cylinder height
Communication	VHF Communication Tx
Communication	VHF Communication Rx
Navigational	DME N
Navigational	CVOR
Navigational	DVOR
Navigational	Direction Finder
Navigational	Markers
Navigational	NDB
Navigational	GBAS Ground Reference Receiver
Navigational	GBAS VDB Station
Navigational	VDB Station
Surveillance	PSR
Surveillance	SSR

Directional navigational facilities

The following are the directional navigational facilities:

• ILS LLZ (medium aperture, single frequency)
• ILS LLZ (medium aperture, dual frequency)
• ILS GP M–Type (dual frequency)
• MLS AZ
• MLS EL
• DME (directional antennas)

All directional navigational facilities have the following parameters:

• a—Distance of the surface extending parallel from the antenna along the centerline of the directional fan.
• b—Distance of the surface extending parallel from the antenna, opposite along the directional fan, along the centerline of the directional fan.
• h—Height of the directionally sloped plane that describes the minimum height of interference.
• D—Distance of plane extending from the antenna perpendicular to the centerline of the directional fan. Height is determined by value of a.
• H—Height of the surface that extends from the bottom of the antenna up to the specified value that connects to the directional fan.
• L—Distance from the center of the antenna, perpendicular to the centerline of the directional fan, to the connection point of the sloped directional fan.
• r—Distance from the base of the antenna; describes the overall length of the directional fan.
• Phi—Represents the angle of the directional fan starting at the distance of D.

For a visual depiction of these measurements, refer to the ICAO EUR DOC 015 document.

The Communication Navigational Surveillance Surfaces tool is a special Create Features template used to make multipatch features based on Specification, Classification and Construction input parameters.

To enable the tool, add a multipatch layer to your map.

Note:

The source multipatch feature class should have horizontal and vertical coordinate systems defined, and it should have a field called DESCRIP designated for up to 255 characters of text. The tool will populate this field with the specification and classification used when the feature was created. Optionally, the ObstructionIdSurface_MP from the Airports 18B data model may be used because it already has a DESCRIP field (Text, 255).

When a multipatch layer is added to the map, a Create Aviation CNS feature template with default settings is automatically created.

Create CNS surfaces for Omni-directional facilities

The following image is a depiction of surfaces created for Omni-directional facilities:

1. On the Edit tab, in the Features group, click Create .

   The Create Features pane appears.

2. The Create Aviation CNS button appears in the Create Features pane under the Multipatch layer.
3. Click Create Aviation CNS .
4. Click the Omni Direction tab.

   The Omni Direction parameters appear.

   

5. Choose a specification from the Specification drop-down list.
6. Choose a classification from the Classification drop-down list.
7. You can maintain and accept the default values in the Construction Parameters section, or edit them, if necessary.

   Note:

   The Construction Parameters are dynamically dependent on the choices made in the Specification and Classification drop-down lists.

8. In the scene, click a point for facility location to create a surface.

   Tip:

   On the Edit tab, in the Snapping group, click Snapping , enable your snapping preferences, and move the pointer back to the map.

   The omni-directional CNS surface is automatically generated.

Create CNS surfaces for directional facilities

The following image is a depiction of surfaces created for directional facilities:

1. On the Edit tab, in the Features group, click Create .

   The Create Features pane appears.

2. The Create Aviation CNS button appears in the Create Features pane under the Multipatch layer.
3. Click Create Aviation CNS .
4. Click the Uni Direction tab.

   The Uni Direction parameters appear.

   

5. Choose a classification from the Classification drop-down list.
6. You can maintain and accept the default values in the Construction Parameters section, or edit them, if necessary.

   Note:

   The Construction Parameters are dynamically dependent on the choices made in the Specification and Classification drop-down lists.

7. In the scene, click a point for facility location to create a surface.

   Tip:

   On the Edit tab, in the Snapping group, click the Snapping button enable your snapping preferences, and move the pointer back to the map.

8. In the scene, click another point for the threshold.

   The Directional CNS surface is automatically generated.