Now a days, Wireless Sensor Network (WSN) is effecting each and every area of life. Underwater Sensor Network (UWSN) is a great development in WSN. UWSN is the foremost research area because of its advantages in seismic monitoring, study of flora and fauna, defense services, weather monitoring, pollution monitoring etc. UWSN is experiencing many challenges in its deployment, routing, communication due to terrible underwater environment. One major challenge is the use of acoustic signal because in UWSN we cannot use radio signals. Some other limitations are propagation delays, larger distance, 3D architecture, node mobility due to water etc. In this paper we have reviewed various existing methods for node mobility based on vector, AUV, path and clusters and proposed a new approach for communication in underwater environment by giving solution to the node mobility issue in 3D based deployment. Proposed approach is using Euclidean distance formula and OSPF dynamic routing, executed and compared with previous algorithms with significant improvement
