HMS Vidal, Rockall, and strategic maritime presence

Vidal was an early small ship designed to operate a helicopter and the last survey ship built at Chatham Dockyard. Her work at Rockall is presented as more than charting: British concern about a possible Soviet occupation near a missile-testing area gave the survey mission a sovereignty and presence dimension. Physical inspection and survey work helped turn an abstract claim into a continuing state activity in a remote part of the North Atlantic. The episode illustrates how small specialist ships can support strategic claims far beyond their apparent combat power.