| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Code |
Notes |
| R.A. | North Russia - Iceland (from December 1942. Replaced Q.P.)(RA 51 sailed 30/12/42). |
| R.B. | Recife (Pernambuco) - Bahia. (R.B.1 sailed 23/2/1943 - (See 1414/25/2) |
| R.B.1. | River steamers from New York to U.K. (Special 1942) |
| R.D. | Gibraltar - Dakar |
| R.J. | Recife (Pernambuco) - Rio de Janeiro.(Comnaveu 1026/12/12/42) |
| R.K. | Rangoon - Arakan Ports or Calcutta. (C.A.F.0. 1101.21.6.45). |
| R.K. | Ceylon - East Africa (R.K.1 arrived Kilindini, 1.5.44). |
| R.M. | Rangoon - Madras - Ceylon. (C. in C.E.I. 230638Z May, 1945) |
| R.N. | U.K. (Methil) - Norway. (CAF.0.1101. 21.6.45) |
| R.O. | R.O.1 see N.O.I.C. Lagos 221910Z. July 1943. |
| R.P. | Rabbit Island to Piraeus. (D.T. D.171713A/Feb, 1945). |
| R.S. | Gibraltar - Sierra Leone (Freetown). R.S.1 sailed 11.2.43.R.S.1.(Y) sailed 21.2.1943. |
| R.T. | Capetown - Freetown (Military). (R.T.1 sailed 4/8). |
| R.T. | Recife (Pernambuco) - Trinidad. (Comnaveu. 1026/12/12/42) |
| R.U. | Reykjavik - Loch Ewe. (W.D.7/12/41). After 17th March, 1943 extended from North America to Loch Ewe via Iceland.(D.T.D.1207A/17/3/43)(Later, Reykjavik - Belfast) |
| Red. | Gibraltar - Port Said - Far East. (Cancelled). |
Data obtained from The National Archives kindly provided by Roger Hollywood.