This site is a database of mercantile vessels that sailed in the SL and SL/MKS convoy series. Currently it holds data for 275 convoys in the range SL.1 - SL.178 together with any associated MKS convoys. Please read the notes before using the database. If you have an enquiry or comment concerning a particular OS/KMS or SL/MKS convoy, or a vessel that sailed in them, then please email me and I will do my best to answer you.
For each convoy, vessels are listed in alphabetical order but should you wish to reconstruct the 'Cruising Order' to show the disposition of the ships, you may download a blank form here (print the page in landscape mode and enter the ships' names according to their pendant numbers). For an example of a complete Cruising Order (Form A1), click here.
The SL series continued until October, 1942 (SL.125) when it was suspended for five months to free resources for Operation Torch (invasion of North Africa which began on November 8, 1942) and also to avoid crossing the US - UK convoy routes. The series recommenced in March 1943 and in April 1943 it was joined by the MKS series bound for the UK from Gibraltar. While the SL series continued until November, 1944 (SL.178), the OS series continued until May, 1945.
The author wishes to express thanks to Dominique Lemaire for diligently proofreading these convoy pages.