'CT' (iii) was the designation of an Allied convoy plying the route from Cristobal, Panama, to Trinidad (July 1942).

The sole such convoy was CT.1 of 2/13 July with the 2,518-ton British Griffco, 2,380-ton US Lake Ormoc, 9,320-ton Norwegian President de Vogue, and 8,571-ton British Scandia.