If they are projecting sonar images at each other, this would be much easier for us to determine than if they are using serial, syntactical language, right? Th

If they are projecting sonar images at each other, this would be much easier for us to determine than if they are using serial, syntactical language, right? They may not be projecting shapes of actual objects, but if they are projecting shapes at all, it would probably be easy to record and reconstruct them visually for us to see, no?