I have never seen them used but I expect it will come. Mullet are not always visible, only in larger shoals in shallow water I would imaging. Too be honest I can't see a drone spotting many fish in the sea but then again I have never tried it. Searching for bays and fishing spots and rocks etc., I can see that might come in handy but nothing a good walk couldn't solve as well. But who knows what the future will bring, could these be used for carrying a weight out a long way, I don't know how they work, would there be too much drag. If they can do that that might be useful, far off good marks that cannot be reached by average casters, say beyond 50-100 yds.