The technology breakthrough that Electronic Chart Display and Information System (ECDIS) has brought to modern navigation has the capability to improve the safety of navigation. This could be achieved only when the capabilities of the system are known by an end-user. Cross Track Limit (XTL) is an ECDIS safety parameter, set by the navigator, which enhances the navigational task automation in the function of workload reduction. Determination of factors affecting the value of XTL safety parameter, with special consideration to chart data reliability, is elaborated in this paper. Chart data reliability depends on the quality of chart survey data, which in many cases are outdated and unreliable. Analysis of past research on this subject is used to define the factors affecting XTL. Practices of different shipping companies with regards to XTL are analyzed and compared in order to confirm if there is a uniform practice between them. Nevertheless, shipping companies have a different or no practice of obtaining XTL, which allows the navigator to define safety parameters by a subjective opinion. In this paper, method of XTL determination for a specific vessel is suggested, considering previously defined factors. Finally, crucial influence of survey data to the safety of navigation is presented in this study.

中文翻译：

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置信区对ECDIS通道规划中的跨轨限制确定的影响

电子海图显示和信息系统（ECDIS）为现代导航带来的技术突破具有提高导航安全性的能力。仅当最终用户知道系统的功能时才能实现。跨轨限制（XTL）是由导航器设置的ECDIS安全参数，可在减少工作负载的功能上增强导航任务的自动化程度。本文阐述了确定XTL安全参数值的因素，并特别考虑了图表数据的可靠性。图表数据的可靠性取决于图表调查数据的质量，在许多情况下，这些数据已经过时且不可靠。对过去关于该主题的研究的分析用于定义影响XTL的因素。分析并比较了不同船运公司关于XTL的实践，以确认它们之间是否存在统一的实践。尽管如此，船运公司还是有不同的获取XTL的习惯，也没有获取XTL的习惯，这使导航员可以通过主观意见来定义安全参数。在本文中，考虑到先前定义的因素，建议针对特定容器的XTL确定方法。最后，本研究提出了调查数据对航行安全的关键影响。考虑先前定义的因素。最后，本研究提出了调查数据对航行安全的关键影响。考虑先前定义的因素。最后，本研究提出了调查数据对航行安全的关键影响。