Relation analysis of ship speed & environmental conditions: Can historic AIS data form a baseline for autonomous determination of safe speed?

IF 1.9 4区工程技术 Q2 ENGINEERING, MARINE

Journal of Navigation Pub Date : 2023-03-01 DOI:10.1017/S0373463323000127

Leif Ole Dreyer

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引用次数: 0

Abstract

Abstract As no internationally agreed-upon method for determining safe speed values currently exists, collecting vast amounts of information on conventional ship behaviour could be used to train autonomous ship intelligence in determining safe speeds in different conditions. This requires speed data collected from conventional ships to resemble what can be described as safe speeds. To test this, the Automatic Identification System (AIS) and environmental data – namely visibility, mean wind speed and significant wave height – were collected and merged for two study areas in Norway in the period between 27 March 2014 and 1 January 2021. Regression analyses based on 47,490 unique vessel transits were conducted and supplemented by two graphical methods for revealing relationships between variables. Contrary to the contemporary understanding of safe speed, reduced visibility did not lead to significantly reduced transit speeds. Wind and waves caused a reduction in speed in the open ocean, but not in coastal waters. Transit speeds were lower in coastal waters than in the open ocean.

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航速与环境条件的关系分析:历史AIS数据能否构成自主确定安全航速的基线?

由于目前没有国际公认的确定安全航速值的方法，因此收集大量关于常规船舶行为的信息可用于训练自主船舶智能，以确定不同条件下的安全航速。这需要从传统船只收集的速度数据与所谓的安全速度相似。为了验证这一点，在2014年3月27日至2021年1月1日期间，在挪威的两个研究区域收集并合并了自动识别系统(AIS)和环境数据(即能见度、平均风速和有效波高)。基于47,490个独特的船舶过境进行了回归分析，并辅以两种图形方法来揭示变量之间的关系。与当时对安全速度的理解相反，能见度的降低并没有导致通行速度的显著降低。在开阔的海洋中，风和海浪会降低速度，但在沿海水域则不会。沿海水域的穿越速度比开阔海域低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Navigation 工程技术-工程：海洋

CiteScore

6.10

自引率

4.20%

发文量

审稿时长

4.6 months

期刊介绍： The Journal of Navigation contains original papers on the science of navigation by man and animals over land and sea and through air and space, including a selection of papers presented at meetings of the Institute and other organisations associated with navigation. Papers cover every aspect of navigation, from the highly technical to the descriptive and historical. Subjects include electronics, astronomy, mathematics, cartography, command and control, psychology and zoology, operational research, risk analysis, theoretical physics, operation in hostile environments, instrumentation, ergonomics, financial planning and law. The journal also publishes selected papers and reports from the Institute’s special interest groups. Contributions come from all parts of the world.