The crew sent out a distress signal, but there was no explanation of the problem.

机组人员发出了求救信号，但没有对问题进行解释。

youdao

We did have a distress signal from them on 23 October.

我们的确在10月23日收到他们的遇险信号。

youdao

Conway flashed a distress signal with his pocket light.

康维拿袖珍手电打出了遇险信号。

youdao

"The Ady Gil then put out a distress signal, a mayday signal, which was ignored and not acknowledged by the Japanese and then they sped away from the scene of this incident."

VOA: standard.2010.01.06

Searches for the Chandlers began on Friday after they sent a distress signal.

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Another is to ensure that there are clear guidelines on what constitutes a distress signal and a vessel in distress.

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"That deal almost sunk K-Tron, " says Cloues, who was a board member at the time and received a distress signal.

FORBES: Counted, Weighed, Divided