内河航行，利用航标、航海仪器、航道图志等引导船舶安全航行。
内河航行船舶。甲板围栏。要求、类型。
Inland navigation vessels. Railings for decks. Requirements, types.
《内河航行记》不仅是亲近自然之旅，更是发现自我之旅。
An Inland Voyage, moreover, is a journey not only into nature but into the self.
内河航标是船舶在内河安全航行的重要助航设施。
Inland river navigation marks are important navigation aid facilities for safe navigation of vessels in inland rivers.
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