  In multi-component systems, several rogue waves can be simultaneously excited
using simple initial conditions in the form of a plane wave with a small
amplitude single-peak perturbation. This is in drastic contrast with the case
of multi-rogue waves of a single nonlinear Schr\"{o}dinger equation (or other
evolution equations) that require highly specific initial conditions to be
used. This possibility arises due to the higher variety of rogue waves in
multi-components systems each with individual eigenvalue of the inverse
scattering technique. In theory, we expand the limited class of Peregrine-type
solutions to a much larger family of non-degenerate rogue waves. The results of
our work may explain the increased chances of appearance of rogue waves in
crossing sea states (wind generated ocean gravity waves that form nonparallel
wave systems along the water surface) as well as provide new possibilities of
rogue wave observation in a wide range of multi-component physical systems such
as multi-component Bose-Einstein condensates, multi-component plasmas and in
birefringent optical fibres.
