¶ Octahedron: Eighth-octahedra (3)
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Octahedron: Eighth-octahedra:
"for big steel ships and the radar scopes clearly outline land masses and other sizable objects. Because they do not show the little sailing ships, those little ships are in incredible danger as they cross–as they must–those big sailing ship lanes. As a consequence of this hazard, there has been evolved a device which can be mounted on the topmast or the yard-arm of sailing ships which does register as a clearly-defined pip on the radar scopes. This device consists of a spherical octahedron with three great circles made of aluminum-foil-covered cardboard surface. The three great circles cross each other at 90 degrees. The spherical surface is uncovered.
"As you look at the device–a radar reflector–you look into whatever number of the spherical octahedron’s central-angular tetrahedra as may be within the line of view. It has been discovered that the ship’s radar signals, when impinging on any one of those eighth-octahedra’s concave tetrahedra, produce a reflection pattern which returns directly back to the radar-sending ship to register on the radar scope.
“What the radar’s invisible-to-the-human-eye electromagnetic”
