  The importance of mass measurements for astrophysical capture processes in
general, and for the rp-process in X-ray bursts in particular is discussed. A
review of the current uncertainties in the effective lifetimes of the major
waiting points 64Ge, 68Se, and 72Kr demonstrates that despite of recent
measurements uncertainties are still significant. It is found that mass
measurements with an accuracy of the order of 10 keV or better are desirable,
and that reaction rate uncertainties play a critical role as well.
