Please check the context of its use in this thread.

Roy Lewallen, W7EL

Cecil Moore wrote:
Roy Lewallen wrote:

As commonly used (as on this thread), takeoff angle is a property of
an antenna, meaning the angle at which the antenna gain is maximum.


We've been through all this before with references being provided to
prove that the definition of "take-off-angle" is not limited to the
angle of maximum antenna gain.
--
73, Cecil, W5DXP