Will my eSIM On Trip internet work on the Aran Islands ferry in Ireland?

Yes, your eSIM On Trip will generally work well when traveling to the Aran Islands. You'll likely have a strong signal at the departure point in Rossaveel and once you're on Inis Mór (the largest island). However, be prepared for a brief period of intermittent or lost connection during the ferry crossing itself, especially in the middle of Galway Bay. The signal usually returns as you approach land.