Nobody Understood Why These Squares Appeared, Until This Man Notices One Detail

Convincing them

John climbed back up to the lantern room, took several photographs through the window, and then sent them off. He waited by the radio, watching the grid through his binoculars, as he waited for the coast guard’s reply.

It came about a minute later. “Yeah, okay. You’re right, that is weird. We will be there in fifteen.”