An Airborne Sonar System for Underwater Remote Sensing and Imaging were proposed by young team of scientist from thew Stanford University.

Check it here:  https://airbornesonar.stanford.edu 

It combines light and sound modalities via the photoacoustic effect, wherein an excitation laser is used to remotely create an underwater acoustic source to act as an airborne sonar system, with highly sensitive sensors and electronics used to capture sound waves reflected from objects underwater and reconstruct 3D images.

While movie is available on the YouTube platform: https://youtu.be/2YyAnxQkeuk

Photography: https://airbornesonar.stanford.edu/