They just go around. It’s not catastrophic just adds cost and time. No refueling or ports required for these mega carriers. We’d go around the cape sometimes j

They just go around. It’s not catastrophic just adds cost and time. No refueling or ports required for these mega carriers. We’d go around the cape sometimes just because of loads, some aren’t allowed through, or because fees were too high for the value of cargo. Depending on the size of the carrier it can add 20 days or so to the voyage.