Norwegian University for Science and Technology

Credit:Marte Finsmyr and Léa Bouffaut. The illustration shows how DAS works. An interrogator (a) sends a laser pulse from a ground station through the fiber optic cable.The cable has defects (b) which underwater sounds slightly displace.This sends back a signal that the interrogator can interpret as acoustic data over regularly spaced intervals or channels (c).
Yes we can monitor whales with existing fiber optic cables