  The end-of-life disposal of Galileo satellites is needed to avoid collisions
with operational spacecraft and to prevent the generation of space debris.
Either disposal in stable graveyard orbits or disposal into the atmosphere
exploiting eccentricity growth caused by lunisolar resonances are possible.
However, there is a concern about the predictability of MEO orbits because of
possible chaotic behaviour caused by the overlap of resonances. In this work,
we investigate if Galileo disposal orbits are predictable and if safe disposal
is possible under initial uncertainties. For this, we employ finite-time
Lyapunov exponents (FTLE) and sensitivity analysis and compare these two
methods regarding their practicality for analysing the predictability of
disposal orbits. The results show that FTLE are not suitable for determining if
an orbit behaves chaotically or not on the time scale of interest. Sensitivity
analysis, on the other hand, can be used to quantify the effect of
uncertainties on the orbital evolution and to determine if safe disposal is
possible. In addition, we show that reliable re-entry disposal is feasible with
a limited \Delta V budget. However, safe disposal into a graveyard orbit is not
always feasible considering uncertainties in the disposal manoeuvre and
dynamical model when the available \Delta V for disposal is low.
