then Turkey) Courier II 1883 - 1931 (survived with another company after 1931) PS Helper 1920 - 1926 RMS Riduna 1926 - 1931 References Transport in Alderney Transport companies established in 1897 Transport companies disestablished in 1931 Ferry companies of the Channel Islands Defunct shipping companies of the United Kingdom Packet (sea transport) Sark Companies of Alderney 1897 establishments in Guernsey