Global convoys need organic air power

Worldwide merchant routes challenge a narrow picture of convoy warfare centered only on the North Atlantic. Second World War shipping also crossed the Arctic, Caribbean, South Atlantic, Bay of Biscay, Mediterranean, and Indian Ocean, and a future conflict would not erase every commercial node outside the main belligerents. Modern container services resemble bus routes with multiple port calls rather than simple voyages between two endpoints. Ever-larger container ships and disruption around Suez and the Red Sea affect the economics of rerouting traffic around Africa, so ship size and route choice shape what navies may have to protect. Britain likewise needed overseas trade and the Singapore sterling area to service debts and sustain its economy while shifting toward wartime production. Convoy protection had to cover a global network with too few bases, aircraft, and escorts. That geography explains why navies needed mobile aviation instead of relying entirely on distant shore stations.