Anguita et al. dismissed the RF method for underwater communication because they reported that it is strongly attenuated [17]. Thus they took as invalid the 2.4 GHz frequency. However EM signals offer higher throughputs than acoustic signals by up to an order of magnitude. For example, Nowsheen et al. [18,19] developed an FPGA-based modem, that used frequencies ranging from 100 kHz to 1 MHz and BPSK modulation, with shipments of data packets with a duration of 1 ms with a wait time of 20 ms. They stated that it is an appropriate interval to avoid the effects of reflections in the tank.