| 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 |
| P.A. | Persian Gulf - Aden and beyond. (9/9/42) |
| P.B. | Persian Gulf - Indian ports (Bombay and Karachi) (9/9/42) |
| P.G. | Panama - Guantanamo.(Cominch 1851Z/6/7/1942) |
| P.G.. | Brisbane - Sydney (N.S.W.) |
| P.G.E. | Pointe Noire to South (local) |
| P.G.W. | Pointe Noire to North (local) |
| P.H. | Piraeus - Heel of Italy. |
| P.K. | Pilot Town (Mississippi - Key West. (Key West 1934Z/10/9/42). To be eliminated after P.K.135. (U.S. Naveem 1611/18/1/43) |
| P.N. | Port Said - Turkey, Northbound. |
| P.O. | Outward bound from Persian Gulf in earlier stages.(See C. in C.E.F. 1350Z/31/8/42). (Never used). |
| P.Q. | Iceland (C) - North Russia. (Admiralty 1230/13/9/41)(known as J.W. convoys from December 1942). |
| P.Q.U. | P.Q. Convoys between U.K. and Iceland. |
| P.R. | Piraeus - Rabbit Island. (D.T.D.171713A/Feb1945) |
| P.S. | Portsmouth - Shoreham escorted group.(C. in C. Portsmouth 0957/27/8/41) |
| P.S.D. | Pointe Noire - Dakar. |
| P.T. | Surinam (Paramaribo) - Trinidad (20/6/42). |
| P.T. | Pearl Harbour - Tarava (Gilbert Is.)(Comnaveu. 1026/12/12/42) |
| P.T.S. | Pointe Noire - Sierra Leone (Freetown). |
| P.W. | Portsmouth - Bristol Channel calling at Falmouth and Dartmouth. (Commenced 4/7/41). |
Data obtained from The National Archives kindly provided by Roger Hollywood.