Special Features:

Dyed to give a non-reflective dull black or a dull green appearance

Properties:

An item which incloses an antenna. It is specifically designed to permit maximum passage of radio frequency energy through it, while providing protection to the antenna from weather. The item may also inclose the antenna support, and rotating mechanism. It may be flexible or rigid, streamlined or irregular shaped. May also include pressurizing mechanism and anti-icing or de-icing equipment. See also cover, antenna element.