Speed Was Not an Escort

On October 2, 1942, the British light cruiser HMS Curacoa sank north of Ireland after colliding with the troop transport Queen Mary. The collision was accidental. The Curacoa’s loss was described as one of the Royal Navy’s worst accidental losses of the war. The brief entry in a wartime chronology offered little drama: a liner, a cruiser, a collision, and a ship gone beneath the sea. The circumstances around the voyage made the encounter more than a bare maritime mishap.

Queen Mary and other liners travelled without escort, relying on speed for safety. Escorts were provided for these ships only within British coastal waters. That arrangement treated speed as protection against the dangers of the Atlantic crossing. It also meant that a fast troopship could be at sea without a naval escort. Curacoa was that coastal escort, and her sinking exposed a different danger: collision between an escort and the fast ship it was guarding. Speed could be an answer to one threat, but it could not make a ship immune to another ship’s course.

Queen Mary was zigzagging at about 28 knots while Curacoa held a straight course at 25; the liner's bow struck the cruiser and cut her in two. What they established was enough: Queen Mary was serving as a troop transport, the liner sailed without escort, and the British cruiser sank after the two collided. The loss came not in a battle with an enemy force, but in an accident at sea. In a war shaped by the movement of troops and ships, even a routine passage could end in a major naval loss.

The incident also showed the limits of reading a wartime voyage only as a contest between a ship and its adversary. The policy of relying on speed rather than escort reflected a practical choice, but it did not remove risk from the crossing. It left the liner dependent on its own speed beyond the waters where escorts were provided. Queen Mary was carrying about 10,000 American troops of the 29th Infantry Division. 337 of Curacoa's crew died. They did record the result: HMS Curacoa sank, and the loss was remembered as one of the Royal Navy’s worst accidental losses of the war. Queen Mary survived the collision; the cruiser did not.