第二十五篇

Passage 25
Charts should be used with prudence：there are areas where the source data are old，incomplete or of poor quality. The mariner should use the largest scale appropriate for his particular purpose；apart from being the most detailed，the larger scales are usually corrected first. When extensive new information (such as a new hydrographic survey) is received，some months must elapse before it can be fully incorporated in published charts. On small scale charts of ocean areas where hydrographic information is，in many cases，still sparse，charted shoals may be in error as regards position，least depth and extent. Undiscovered dangers may exist，particularly away from well-established routes.
海图将被谨慎使用：有一些区域，数据源是旧的，不完整或质量差。航海者为他特别用途适用的使用大比例尺;除了是最详细的，大比例尺通常首先改正。当大量新的信息（如新的水文调查）收到，几个月前的要全部合并在出版的海图中。关于小比例的海洋区域在水文信息是，在许多情况下，仍然稀疏，绘制浅滩关于位置可能是错误的，最少深度和范围。未发现的危险可能存在，尤其是远离得到确认的航线。