How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）<br>A:6 months<br>B:1 year<br>C:2 years<br>D:3 years

How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）
A:6 months
B:1 year
C:2 years
D:3 years

出自：海船船员证

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