| 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 |
| S.B. | Sydney (C.B.) - Cornerbrook (N.F.). (N.S.H.Q. Ottawa 1530Z/3/5/42). (Suspended 1442Z/6/7/42). |
| S.B.F. | North Africa - Assault (Landing craft) Operation 'Husky', July 1943. |
| S.B.M. | North Africa - Assault Operation 'Husky', July 1943. (Fast and Slow). |
| S.C. | Sydney (C.B.) or Halifax or New York - U.K. (Slow). |
| S.D. | Iceland (Reykjavik) - Clyde, Ferry Service. (Military). |
| S.G. | Sydney (C.B.) - Greenland, (S.G.1 sailed 6/7/42). |
| S.G. | Freetown - Gibraltar (see F.O.C.W.Af.0955Z/31/1/43) but Admiralty proposed S.R., q.v. |
| S.G. | Southend - Grimsby (cancelled) |
| S.H. | Sydney (C.B.) - Halifax. (N.S.H.Q. Ottawa 1525Z/17/5/42). |
| S.H.X. | Subsidiary convoy from Sydney C.B. to join H.X. Convoy. |
| S.J. | Singapore - Colombo. (Admty. 1748A/19/11/41). |
| S.J. | Santos - Rio de Janeiro. |
| S.L. | Sierra Leone (Freetown) - U.K. (Temporarily discontinued 29.9.1942, during 'Torch'. (Resumed February, 1943). (Slow). |
| S.M. | Batavia - Fremantle (cancelled). |
| S.M. | Singapore - Melbourne (Admty. 1748A/19/11/41).(Combined Military and Trade). |
| S.M. | Naples - French Mediterranean Ports. (1944). |
| S.N. | Italy - Algiers and Oran. |
| S.N. | Sydney (N.S.W.) - New Caledonia. (C.P.S.F. 151605B May 1943) |
| S.N.F. | Naples - Oran (Fast). |
| S.N.F.1 | See N S.F.1 (Returning convoys). |
| S.O. | Seychelles - Diego Suarex, S.D.1. sailed 16.2. arrived 19.2.1944. |
| S.P. | Shoreham - Portsmouth (escorted group). |
| S.Q. | Sydney (CB.)-Quebec. (N.S.H.Q. Ottawa 1525Z/17/5/42). |
| S.Q.S. | Sydney (C.B.) - Quebec. (N.S.H.Q. Ottawa 1530Z/3/6/1942). (Cancelled). (Slow) |
| S.R. | Calcutta - Rangoon (Military). (Cancelled). |
| S.R. | Sierra Leone (Freetown) - Gibraltar. (See D.T.D.1311A/5 to F,O.C.W.Af. (S.R.1 sailed 10.2.1943). |
| S.S. | Calcutta - Singapore (Military). (Cancelled). |
| S.T. | Sierra Leone (Freetown) - Takoradi. |
| S.T.C. | Sierra Leone (Freetown) - Capetown. |
| S.T.F.1. | See T.S.P.1. (Returning convoys). |
| S.T.L | Sierra Leone (Freetown) - Lagos. |
| S.T.P. | Sierra Leone (Freetown) - Point Noire. |
| S.T.W. | Sierra Leone (Freetown) - Walvis Bay. |
| S.U. | Suez - Australia (Military returning ex W.S. Trooper). (Run very rarely). |
| S.V. | Sydney (N.S.W.) - Townsville. |
| S.W. | Middle East - UK (Returning empty except for passages). |
| S.W. | Suez - Durban or Cape (Military). |
| Silvertip | Newhaven - Dieppe convoys of shuttle service. |
Data obtained from The National Archives kindly provided by Roger Hollywood.