这些声音代表着国际求救信号，因为它们易于识别。现在，它被简称为s.o.s。

These sounds represent the international call for help because they are easy to recognize. Now, it is simply known as S. O. s.

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国际海洋法规定，包括军舰在内的所有舰船都必须对附近船只发出的遇险求救信号予以回应，并尽可能提供援助。

International maritime law compels all vessels, including military units, to answer distress calls from nearby boats and to offer help where possible.

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