Cruisers on imperial duties rely partly on display and the impression they create. Helicopters could land a small party before its cruiser appears over the horizon. The January 1939 incident involving Birmingham offers a more immediate application: a helicopter could place the roughly eight-person midshipman's party on the merchant vessel before Birmingham docked or the Japanese realized it had arrived. In this counterfactual, the boarding party gains the initiative through speed and surprise.
Notable Point · 1:53:03-1:55:46
Cruiser helicopters combine display with rapid boarding
A helicopter-borne boarding party could establish a British presence before Birmingham reached the merchant vessel.