I. Introduction
Recently, research on Underwater Acoustic Networks (UANs) has attracted significant attention due to the potential application in environmental monitoring, resource investigation, disaster prevention and so on[1][2][3]. Most researches are based on theoretical analysis and simulations[4][5]. However, dynamic underwater environment and complicated communication systems cannot be well reflected by simulation. So, there are a few test-beds of UANs was developed for the past few years. But the transmission result and network performance of multi-hop UANs test-bed have not been presented in literatures so far[6][7][8][9].