BaseOps User's Guide, Chapter 15: Editing Avoidance Areas

An avoidance area is a cylindrical-shaped portion of airspace where aircraft operations are prohibited.

The NMAP and RNM noise models do not use avoidance areas, but since flight track routes are often constrained by them, it may still be useful to display them on BaseOps maps: see Annotating Maps with BaseOps Objects.

To work with avoidance areas, choose Avoidance Areas from the object type selector dropdown list. Avoidance areas can be added, duplicated, and deleted as described in Working with the List Pane.

To edit an avoidance area, first select it in the object list, then edit its properties in the text pane.

Avoidance areas have the following properties.

• Name - A short (10 characters maximum) name that uniquely and unambiguously identifies the avoidance area.

• Long Name - A one-line (80 characters maximum) name for the avoidance area. The long name can be more descriptive than the short name. It is optional: if you do not supply a long name, the short name will be used in its place when necessary.

• Notes - Miscellaneous information about the avoidance area. There is no restriction on the length of notes. Press the Enter key to insert additional lines.

• Location - The location of the center of the avoidance area.

  You can change the coordinate system used to specify locations: see Setting the Case Coordinate System.

  Using the Select and Edit map tool, you can drag the center of the avoidance area to another location on the map. See The Select and Edit Mouse Tool for more information.

• Radius - The radius of the avoidance area.

  You can change the units used to specify the radius: see Setting the Case's Physical Units.

• Ceiling - The height of the top of the avoidance area. Type the height, then select whether the height is above ground level (AGL) or above mean sea level (MSL).

  Aircraft are permitted to fly over the avoidance area if they are higher than the area's ceiling. The bottom of the avoidance area is always ground level.

  You can change the units used to specify the height: see Setting the Case's Physical Units.