In this research work we found an application of Wireless Sensor Network (WSN) in underground water. In today developing environment the wireless system plays an important role in communication process. Though there are many equipment’s to carry out the communication successfully Sensors plays a vital role. In this research work we found many interesting aspects of underwater acoustic communication. In this work we have described on critical analysis on requirements of system and system design and development methods. The Underwater Sensor Network (UWSN) is a powerful technique which is used for aquatic application and it’s different from other ground based networks. There is a long propagation delay and the bandwidth is low with high error rate.Keywords: UWSN, armor, aqua-flecks, tinyOS, AUV and nesC
