This part of GB/T 19721 establishes the principles of sea ice forecast and warning issuance, stipulates the classification conditions for sea ice forecast and warning issuance, and the content, procedures and technical requirements of forecast and warning issuance. This section applies to all oceanographic forecasting services.
GB/T 19721.3-2006 history
2017GB/T 19721.3-2017 The issue of marine forecasts and warnings—Part 3: The issue of sea ice forecasts and warnings
2006GB/T 19721.3-2006 The issue of marine forecasts and warnings Part 3: The issue of sea ice forecasts and warnings