The issue Ulysses and other ferries have at holyhead has is related to the direction of the wind and the Berth.
While Ulysses has three forward Thrust unts sometimes she needs a tug to assist her onto the berth.
Unfortunately Oscar Wilde stuggles in bad weather berthing due to lack of adequet Thruster Power hence her cancelations
over the Christmas on the Holyhead route, She is a great ship but not every ship will work succesfully in the port of Holyhead.
If Terminal 4 Berth were introduced this would solve this problem in extream weather conditions,