Engineers at Stanford University created an airborne method of imaging objects lying deep underwater — blending light and sound to penetrate the stubborn barrier of interference at the surface of water, according to a recent study published in the journal IEEE Access.The researchers think their new hybrid optical-acoustic system might eventually play a role in conducting drone-based biological marine surveys from the air, in addition to executing large-scale aerial searches of sunken ships and planes, and mapping the deep black depths of the ocean at similar opacities and speed as we do with above-water landscapes.