Would the naval treaties prevent a ship with vertical-launch missiles from qualifying as an auxiliary?
Short answerIts classification would depend on the ship's other characteristics, but operational VLS in the interwar period requires a substantial technological counterfactual.
NotesAn imagined vertical-launch ship would still have to satisfy the treaty criteria governing its classification. A vessel qualifying as an auxiliary could be larger than 2,000 tons, and Unicorn is used as a size comparison for a support vessel. A forward-support rocket vessel is the proposed way to frame the concept. The larger difficulty is technological: making VLS work in the 1920s or 1930s requires inventions that the scenario simply assumes.