VIJAYAWADA: The Energy department has decided to test the waters to identify the wave (tidal) energy potential in Andhra Pradesh, which has a 974 km coastline, the second-longest in the country.Two projects have been proposed to see if wave energy can be harnessed to find a viable source of clean, renewable power. While one energy plant is expected to come up near Visakhapatnam, the officials concerned are yet to identify a location for the second.