Stena Adventurer currently operates the Dublin - Holyhead route for Stena Line alongside Stena Superfast X. Built in 2003 by Hyundai Heavy Industries of South Korea for Stena. The vessel replaced the Stena Forwarder which at the time operated the Dublin - Holyhead service. Stena has made many improvements to the vessel including a major internal refit in 2009 when the company invested heavily in the Irish Sea Fleet. The ship runs alongside the Ulysses operated by Irish Ferries seen as Stena's main competitor.