They cost Imperial Airways £140,000 to build in 1948, but these tragic-looking and surprisingly watery relics of the “golden age of air travel” are all that remain of Southampton’s heritage as an early airport.

The arrow-straight estuary called Southampton Water is well-protected from the swells and waves of the English Channel, which made this unusually calm and sheltered six-mile long tidal stretch ideal for the taxi, take off, and landing of flying boats. For a time, regular services departed Southampton Water on far-flung intercontinental voyages.

Small yet exclusive numbers of wealthy globetrotting passengers could be delivered in style to far-off destinations without the need to develop costly new infrastructure like runways. With multiple stopovers in the exotic territories of the moribund British empire en-route, the sedate and opulent flying boats had saloon bars, restaurants, and personal cabins on board to keep passengers entertained in luxury during the low-altitude voyage.

The much-feted completion of the new Marine Air Terminal in 1948 marked a glamorous return of these airborne leviathans after a brief wartime hiatus, which had seen Southampton and its industries heavily bombed. Unfortunately for the post-war developers of the Marine Air Terminal, despite Southampton having been one of the worlds largest flying boat hubs in the early 20th century, by 1948 that ship had sailed.

Just two years after the Marine Air Terminal opened, modernity had finally caught up with the idea of the commercial seaplane. Abandoned wartime airfields were being cheaply repurposed all over the world as regional commercial airports, and improvements in aerospace technology had improved flight times. BOAC, the successor to Imperial Airlines, invested in high-flying, modern jet aircraft with pressurized cabins and sold their fleet of opulent intercontinental flying boats to a now-defunct Southampton-based airline, Aquila.

Aquila kept short haul services running to the mountainous Portuguese island of Madeira until 1958, when after only a decade in service, the once-glitzy and glamorous pontoons of the Marine Air Terminal were abandoned to the action of the estuary’s famous double high-tides and hidden from sight by the rapid development of this busy commercial port.