  General relativistic tidal equations are formulated with respect to the rest
frame of a central gravitational source described by the Kerr gravitational
field. Specifically, observers that are spatially at rest in the exterior Kerr
spacetime are considered in detail; in effect, these fiducial observers define
the rest frame of the Kerr source. The generalized Jacobi equation for the free
motion of a test particle is worked out within the Fermi coordinate system
established along the world line of a fiducial observer at rest on the symmetry
axis of the exterior Kerr background. The nature of the solutions of these
equations are investigated in connection with the phenomena associated with
astrophysical jets.
