TY - JOUR N2 - Underwater Wireless Sensor Networks (UWSNs) are finding different applications for offshore exploration and ocean monitoring. In most of these applications, the network consists of significant number of sensor nodes deployed at different depths throughout the area of interest. The sensor nodes located at the sea bed cannot communicate directly with the nodes near the surface level; they require multi-hop communication assisted by appropriate routing scheme. However, this appropriateness depends not only on network resources and application requirements but also on environmental constraints. All these factors provide a platform where a resource-aware routing strategy plays a vital role to fulfill the different application requirements with dynamic environmental conditions. Realizing the fact, significant attention has been given to construct a reliable scheme, and many routing protocols have been proposed in order to provide an efficient route discovery between the sources and the sink. In this paper, we present a review and comparison of different algorithms, proposed recently in order to fulfill this requirement. The main purpose of this study is to address the issues like data forwarding, deployment and localization in UWSNs under different conditions. Later on, all of these are classified into different groups according to their characteristics and functionalities. © 2011 Elsevier Ltd. All rights reserved. IS - 6 KW - Application requirements; Area of interest; Classification of protocols; Data-forwarding; Environmental conditions; Environmental constraints; Multi hop communication; Network resource; Ocean monitoring; Offshore exploration; Resource aware; Route discovery; Routing scheme; Routing strategies; Routing techniques; Sea bed; Underwater acoustic communications; Underwater sensor networks; Underwater wireless sensor networks KW - Routing protocols; Sensor nodes; Sensors; Telecommunication equipment; Underwater acoustics KW - Wireless networks ID - scholars1856 Y1 - 2011/// UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-80052738667&doi=10.1016%2fj.jnca.2011.06.009&partnerID=40&md5=5f6b06b01526ca783383b2788fcf11c7 A1 - Ayaz, M. A1 - Baig, I. A1 - Abdullah, A. A1 - Faye, I. JF - Journal of Network and Computer Applications VL - 34 AV - none N1 - cited By 294 SP - 1908 TI - A survey on routing techniques in underwater wireless sensor networks SN - 10848045 EP - 1927 ER -