  We show that ion masses in superfluid $^3$He ought to be enormously enhanced
(by a factor of 100) as compared with the same ion masses in $^4$He measured at
low temperature. We calculate precisely the dependence of the effective mass on
pressure in $^3$He-B, and show that the coherent (ballistic) motion of ions in
$^3$He-B can be studied experimentally at $ T < (0.3-0.2) T_c $.
