Yes, you are encouraged to go outside on Irish Ferries vessels, which feature expansive "outer decks" specifically designed for passengers to enjoy the fresh sea air and the dramatic views of the Irish Sea. On large cruise ferries like the W.B. Yeats and the Ulysses, there are dedicated "promenade" decks where you can walk the perimeter of the ship. These areas are usually equipped with seating and glass barriers to shield you from the strongest winds while still providing an open-air experience. However, accessibility to these decks depends on the weather conditions. In 2026, the ship's captain may close the outer decks for safety during periods of high winds or heavy swells, which are common in the winter months on the Dublin-Holyhead or Rosslare-Cherbourg routes. If the weather is clear, standing on the deck as you sail past the Poolbeg Chimneys in Dublin or the cliffs of Holyhead is one of the highlights of the crossing. For safety, children must be supervised at all times on the outer decks, and smoking is typically restricted to specific designated "smoking zones" on these exterior levels.