Companhia Colonial de Navegação

The Companhia Colonial de Navegação (CCN) (literally "Colonial Navigation Company") was a Portuguese shipping company that was founded in 1922 and merged into another company in 1974. Its ships carried freight as well as passengers. It was perhaps best known during the Second World War, when its ships, flying the neutral Portuguese flag, were some of the few to provide transatlantic service.

The company was founded in Angola on 3 July 1922 to serve Portugal's overseas colonies, particularly those in Portuguese Africa. It started service with two ships, the Guiné I and Ganda I, serving destinations in Angola, the Cape Verde Islands, and Guinea Bissau.

During the Second World War, the company expanded to take advantage of its status as one of the few shipping companies based in a [neutral nation in a position to provide service between ports in the Western Hemisphere and Europe. It acquired ships to meet the new demand, notably the Princess Olga from a Yugoslavian company, which it renamed the Serpa Pinto and used in voyages between Portugal, the United States, and Brazil. Each of the company's ships had its name and PORTUGAL written in very large letters on their sides, as well as a prominent Portuguese flag. Even so, two of the company's ships, the steamers Cassequel and Ganda II, were torpedoed and sunk during the conflict. The Serpa Pinto was stopped and boarded in 1944 (May 26) in the mid-Atlantic by the German U boat U-541, but the ship was ultimately allowed to proceed after the German naval authorities declined to approve its sinking.

...
Wikipedia