7.1. Chemical Approach to the Atmospheric Link Layer
Information is sent by transmitters producing a specialized form of
smoke, most often by emitting a specialized oil onto the exhaust
manifold. The oil, held in a pressurized container, is vaporized in
a thick white smoke, producing readable display. The makeup of the
smoke is often subject to patents, and any organization interested
should consult with their attorneys. Further details on transmission
on the Physical Layer is beyond the scope of this RFC, but
implementers MAY refer to references for help. It is by design that
the broadcast mechanism does not result in incompatibilities if
implementers choose different Physical Layer implementations.
