  The electric and the magnetic part of the Weyl tensor, as well as the
invariants obtained from them, are calculated for the Bondi vacuum metric. One
of the invariants vanishes identically and the other only exhibits
contributions from terms of the Weyl tensor containing the static part of the
field. It is shown that the necessary and sufficient condition for the
spacetime to be purely electric is that such spacetime be static. It is also
shown that the vanishing of the electric part implies Minkowski spacetime.
Unlike the electric part, the magnetic part does not contain contributions from
the static field. Finally a speculation about the link between the vorticity of
world lines of observers at rest in a Bondi frame, and gravitational radiation,
is presented.
