H.M.S. Ocean is the sixth ship to bear the name. Based in Devonport, she was commissioned on 30 September 1998 and completed her trials programme and initial Basic Operational Sea Training in the spring of 1999.
The Amphibious Helicopter Carrier's primary role is to carry an Embarked Military Force (EMF) supported by 12 medium support helicopters, 6 attack helicopters and 4 Landing Craft Vehicle Personnel (LCVP) Mk 5 Landing Craft.