Abstract
In this paper, we study the localization problem in large-scale Underwater Wireless
Sensor Networks (UWSNs). Unlike in the terrestrial positioning, the global positioning system
(GPS) can not work efficiently underwater. The limited bandwidth, the severely impaired
channel and the cost of underwater equipment all makes the localization problem very
challenging. Most current localization schemes are not well suitable for deep underwater
environment. We propose a hierarchical localization scheme to address the challenging
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This is shwetha. Please send me the full report of UNDERWATER WIRELESS SENSOR NETWORKS ....etc

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please post the under water wireless sensor networks ppt ....etc

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Hi..
I am Shwetha Damodaran. I need full report of the seminar topic UNDERWATER WIRELESS SENSOR NETWORKS. I really don't have much idea about this topic. Please help me. ....etc

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1. INTRODUCTION
Although covering more than 70% of the Earth surface the oceans are not well known, due to its dimensions, difficulties of oceanographic data acquisition and the high costs of maritime operations. Nervertheless, there is an increasing interest on oceanographic data, due to its influence on the weather, fishing, navigation, biology, ecology and support for petroleum resources offshore exploration.
The traditional approach for ocean monitoring and data acquisition is based on several sensors gathered i ....etc

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underwater wireless sensor networks for my seminars
madhu 8th sem BE.
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Abstract
Ocean bottom sensor nodes can be used for oceanographicdata collection, pollution monitoring, offshore explorationand tactical surveillance applications. Moreover, Unmannedor Autonomous Underwater Vehicles (UUVs, AUVs),equipped with sensors, will find application in exploration ofnatural undersea resources and gathering of scientific data incollaborative monitoring missions. Underwater acoustic networkingis the enabling technology for these applications. UnderwaterNetworks consist of a variable number of sensors and vehiclesth ....etc

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Abstract

The use of sensor networks in aquatic environments has been quite limited, partially due to the harsh underwater environments and associated high system costs. Nevertheless, cost-effective and resource-efficient Underwater Wireless Sensor Networks (UWSNs) will bring significant benefits to numerous aquatic applications. The unique properties of underwater environments raise many new challenges in building an efficient UWSN. We will discuss several architectural challenges and possible research topics in this paper.

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Abstract
A SEA Swarm (Sensor Equipped Aquatic Swarm) isa collection of mobile underwater sensors that moves as a groupwith water current and enables 4D (space and time) monitoringof local underwater events such as contaminants and intruders.For prompt alert reporting, mobile sensors routes events to mobilesinks (i.e., autonomous underwater vehicles) via geographicrouting that is known to be most efficient under mobility andscarce acoustic bandwidth. In order for a packet to be routed tothe destination using geographical routing, it req ....etc

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