I have started working on trying to design some better antennas for the cave radios in use for radiolocation and general caver communications. Most of the antennas I have seen are loop antennas operating at 65 or 130-ish kHz. I am open to all sorts of antennas. Of course no matter what antenna type I use, it will be electrically short. I know that, the limitation here is the frequency that will penetrate the cave ceiling (of which I am unsure of). Does frequency have any impact on radiolocation accuracy (assuming proper antennas and all that good stuff)?