Which mooring type includes the option of up to 50 kt wind with 1.5 kt broadside current or up to 64 kt wind with 1 kt broadside current?

• A. MST I
• B. MST II
• C. MST IIA
• D. MST III

Answer: (C)

Mooring types define the safe operating envelope for wind and current that the system can handle based on the strength and redundancy of the anchors, lines, and spread. The two scenarios shown—high wind with a moderate cross-current and even higher wind with very little cross-current—require a stronger, more capable mooring arrangement to keep the vessel secure without overstressing the lines or anchors. The type described is designed to cope with those conditions by using a more robust configuration (greater strength, redundancy, and appropriate scope), allowing operation in up to 50 kt winds with 1.5 kt broadside current or up to 64 kt winds with 1 kt broadside current. That capability matches the higher-capacity mooring option, making it the correct choice.