The "V" aerial and also the inverted "L" type both receive waves much better when they come from a direction opposite to that in which the free end points.
FIG. 19.—A diagram showing the arrangement of a "T" aerial.
Probably the most interesting feature of the directive action of aerials lies in the fact that a land station is able to determine the approximate bearing of a ship signaling with a horizontal aerial.
FIG. 20.—Flat top aerials of the inverted "U" and "T" types.
It is beyond the scope of the book to enter into all of the engineering details pertaining to the installation of a wireless station, but a few remarks and instructions for the benefit of those who may be interested in this phase of the subject may be appreciated.
The flat-top "T" aerial gives the best "all around" results. The vertical and umbrella forms are close seconds.
FIG. 21.—Umbrella aerial.