Home / Standards / GB 17380-2020 GB 17380-2020 Active Regulation on aids to navigation for marking of offshore structures, China 中国海区水中建(构)筑物助航标志规定 Standard Type GB ICS 03.220.40 CCS R63 Status 现行 Issue Date 2020-11-17 Implementation 2021-12-01 Responsible Dept 交通运输部 Drafting Unit N/A