  We study the electrodynamics of spin triplet superconductors including
dipolar interactions, which give rise to an interplay between the collective
spin dynamics of the condensate and orbital Meissner screening currents. Within
this theory, we identify a class of spin waves that originate from the coupled
dynamics of the spin-symmetry breaking triplet order parameter and the
electromagnetic field. In particular, we study magnetostatic spin wave modes
that are localized to the sample surface. We show that these surface modes can
be excited and detected using experimental techniques such as microwave spin
wave resonance spectroscopy or nitrogen-vacancy magnetometry, and propose that
the detection of these modes offers a means for the identification of spin
triplet superconductivity.
