  In this paper, we study solitary waves propagating along the surface of an
infinitely deep body of water in two or three dimensions. The waves are acted
upon by gravity and capillary effects are allowed --- but not required --- on
the interface. We assume that the vorticity is localized in the sense that it
satisfies certain moment conditions, and we permit there to be finitely many
point vortices in the bulk of the fluid in two dimensions. We also consider a
two-fluid model with a vortex sheet.
  Under mild decay assumptions, we obtain precise asymptotics for the velocity
field and free surface, and relate this to global properties of the wave. For
instance, we rule out the existence of waves whose free surface elevations have
a single sign and of vortex sheets with finite angular momentum. Building on
the work of Shatah, Walsh, and Zeng, we also prove the existence of families of
two-dimensional capillary-gravity waves with compactly supported vorticity
satisfying the above assumptions. For these waves, we further show that the
free surface is positive in a neighborhood of infinity, and that the
asymptotics at infinity are linked to the net vorticity.
