If wind is up to 75 kt with 2 kt broadside current or less, which mooring type applies?

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

Answer: (D)

The main factor here is the loads produced by very high wind, while the current is minimal. When winds reach hurricane strength, you need the most robust mooring setup because wind drag and wave action create extreme tension and dynamic loads on every line and anchor. The strongest system is designed to handle those loads with ample redundancy, giving the vessel a much safer margin against line failure or parting under surge and gusts. The other mooring types are intended for lighter wind conditions or scenarios with higher currents, and would not provide adequate strength or redundancy under 75 kt winds, even with a small cross-current.