Arrival and departure times at Devonport harbour are adjusted regularly to allow vessel movements to take place with the minimum of disruption. Over the last 12 months, only one Royal Navy or Royal Fleet Auxiliary (RFA) vessel, RFA Largs Bay, was required to remain outside of the harbour due to movement restrictions and the availability of berths.
Over the last two years, only one Royal Navy vessel was diverted from HM Naval Base Devonport. In February 2007, HMS Ocean was transferred to HM Naval Base Portsmouth due to the unavailability of a Devonport berth for unplanned defect rectification.
Disruption to routine sailings due to adverse weather conditions is not routinely recorded although it is estimated that during the last 12 months there were six occasions when Royal Navy or Royal Fleet Auxiliary movements were disrupted within Devonport harbour as a result of poor visibility due to fog, rain or high winds.