Risks and contingency

The principal operational risks identified for this expedition include

  • Shallow water coring (at proposed Site YB-1);
  • Weather. Although the expedition has been scheduled take place in late summer, which is the optimum weather window, severe weather (e.g., typhoons) may still occur and could adversely impact operations;
  • The presence of gas-prone sediments at some sites and depths leading to a potential for core expansion on deck. Moreover, potentially high H2S contents may require degassing of the cores on the catwalk after they are recovered;
  • Alternating lithologies that may lead to hole instability;
  • Commercial fishing operations and normal marine traffic; and
  • An extremely ambitious operations plan for the time available. Good time management will be extremely important to mitigate this risk.

All of these factors may affect coring and drilling operations.