The uncertainty relations associated to the covariant \kappa-deformation of D=4 relativistic symmetries, with quantum ``time'' coordinate and modified Heisenberg algebra, are shown to be consistent with independent heuristic estimates of limitations on the measurability of space-time distances. Our analysis generalizes the one previously reported by one of us, which considered only the space-time coordinate sector.

PACS numbers: 11.10.Lm