The comparison includes Rosyth, Inchgreen, Belfast, Teesport, Birkenhead, and a proposed Portsmouth facility. Dimensions alone do not settle the matter: private yards must fit naval work between commercial contracts, and the unbuilt Portsmouth option provides no emergency capacity. Rosyth's 310-metre dock helped set the practical limit on carrier construction length, while longer yards elsewhere would leave fewer places able to maintain a larger hull. Keeping private docks commercially productive preserves industrial capability, but it makes sudden naval access uncertain. Rosyth stands out because carrier construction concentrated infrastructure and security there.
Chapter · 15:47-20:18
Why the Queen Elizabeth class has few dry-dock options
Potential berths for Britain's large carriers exist on paper, but commercial schedules, incomplete works, security, and support facilities leave Rosyth as the clear practical option.