Using the Sea Swells to Detect Land, Right?

"We can sort of loosely imagine, like, a basic form of this," he says. "What would happen if you then dropped some islands in there? It could disrupt the waves." And and this wave disruption can be identified by a skilled eye, enabling them to detect land a hundreds of kilometers wave, which is pretty amazing, right? He adds: 'So now we have not only the stars above, but also o the wave patterns'