Home / Standards / GB/T 19721.4-2022 GB/T 19721.4-2022 Active The issue of marine forecasts and warnings—Part 4: The issue of tsunami warnings 海洋预报和警报发布 第4部分:海啸警报发布 Standard Type GBT ICS 07.060 CCS A45 Status 现行 Issue Date 2022-12-30 Implementation 2023-04-01 Responsible Dept 自然资源部(海洋) Drafting Unit N/A