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Along with the development of ocean technology, the development of ocean detection, monitoring and exploitation has been made. Ocean observation network is a mature, all-weather fixed observation platform, which can achieve real-time and long term monitoring of its observation range. With the forming of mobile observation network, the underwater helicopter as an important part of mobile observation...
The accuracy estimation of positioning system operation for autonomous underwater vehicle (AUV) based on using of single hydro acoustic beacon transported by autonomous surface vehicle (ASV) is discussed. The accuracy research is performed for two navigation algorithms which used information about distance to a single mobile beacon and data from the AUV onboard reckoning system. The first algorithm...
Given a middle-scale underwater acoustic network, to collect data from the multiple underwater nodes, the surface destination node need to be working on mobile data collection mechanism. In this paper, compared to traditional automatic-repeat-request (ARQ) protocol, we proposed node cooperation (NC) to increase the data collection efficiency for the surface node, utilizing the fact that underwater...
Recently underwater acoustic sensor networks with autonomous underwater vehicles (AUVs) have been applied in various areas, such as ocean data collection, marine environment monitoring and military surveillance, which static networks can hardly accomplish. In order to achieve the missions, effective communication is crucial and needs the guarantee of medium access control (MAC) protocol, which schedules...
Unmanned Surface Vehicle (USV) is a novel kind of oceanic platforms, which is potential to be an effective platform for acoustic applications. Active and passive underwater acoustic experiments using our USV called USBV at Ji-hong-tan reservoir in Qingdao on July 15–17, 2015 and at Wu-zhi-zhou Island in the South China Sea on January 3–6, 2016 are presented to quantify this potential. The acoustic...
The Automatic Identification System is an electronic system enabling vessels to send localization messages. Those messages are used for several uses such as fleet control, traffic control or boarding prevention. Sent messages contain errors, falsifications and undergo spoofing due to the unsecured channel of transmission, and that weakens the whole system and the safety of navigation. This paper presents...
Knowledge of a flow field is crucial to guide oceanic mobile sensing platforms; yet, existing regional ocean models provide insufficient spatial and temporal resolutions for precise guidance of mobile platforms. By combining computational ocean models with real-time data streams collected from mobile platforms, generic environmental models (GEMs) provide high-resolution predictions of ocean currents...
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