Abstract: The next-generation wireless networks such as the fourth generation (5G) cellular systems are targeted at supporting various applications such as voice, data, and multimedia over packet-switched networks. In these networks, person-to-person communication can be enhanced with high quality images and video, and access to information and services on public and private networks will be enhanced by higher data rates, quality of service (QoS), security measures, location-awareness, energy efficiency, and new flexible communication capabilities. But the channel remains a challenge most especially the riverine areas. Recently, radio frequency (RF) propagation in the riverine areas has been the interest of much theoretical and experimental research. This research work is concerned with the statistical studies of GSM (Global System for Mobile communication) radio wave propagation over the sea path of Igbokoda, Ondo State, Nigeria, at the limits of line-of-sight range in order to determine or establish a relationship that exist between sea conductivity and signal propagation. At every point of observation where signal measurements were taken using Test Mobile system (TEMs) pocket, corresponding water samples were also taken using sample container for conductivity test at the laboratory. The only possible explanation for these large propagation distances is that the conductivity of seawater changes at small field strengths due to hydrogen bonding in water. Consequently, this research work has evaluated and presented a relationship that exist between sea conductivity and GSM signal propagation as -0.98 correlation coefficient which implies inverse relationship (i.e. sea conductivity attenuates signal) the higher the sea conductivity, the lower the signal strength

Keywords: GSM, Signal propagation, Sea water, Conductivity