Home / Standards / GB 12708-1991 GB 12708-1991 Abolished The colours of light signals on aids to navigation 航标灯光信号颜色 Standard Type GB ICS 43.040.20 CCS R63 Status 废止 Issue Date 1991-01-29 Implementation 1991-10-01 Responsible Dept 交通运输部 Drafting Unit N/A