How long must the GMDSS radio log be retained on board?（）<br>A:At least two years after the last entry<br>B:At least one year after the last entry<br>C:At least 90 days after the last entry<br>D:At least 30 days after the last entry

How long must the GMDSS radio log be retained on board?（）
A:At least two years after the last entry
B:At least one year after the last entry
C:At least 90 days after the last entry
D:At least 30 days after the last entry

出自：海船船员证

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