Due to the rise of small unmanned surface boat in surveying and mapping, fishery administration, military，how to build a long-distance over-the-horizon information link has gradually become a hot spot，the networking application of Very Small Aperture Satellite Terminal (VSAT) station has become an effective and necessary means for information control and access of small unmanned surface boat. In order to better promoting the application of satellite VSAT networking technology in unmanned equipment, combined with the characteristics of satellite VSAT communication system, the main access mode, coding mode and link budget are analyzed, and the main conditions to be considered in networking application are analyzed in detail through practical application cases at sea, which can be used for the deployment and networking guidance of satellite VSAT on offshore platforms.