  We experimentally investigate internal coastal Kelvin waves in a two-layer
fluid system on a rotating table. Waves in our system propagate in the prograde
direction and are exponentially localized near the boundary. Our experiments
verify the theoretical dispersion relation of the wave and show that the wave
amplitude decays exponentially along the propagation direction. We further
demonstrate that the waves can robustly propagate along boundaries of complex
geometries without being scattered and that adding obstacles to the wave
propagation path does not cause additional attenuation.
