Office of the Chief of Naval Operations to Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters
Op-46 SECRET 26 June 1918
Following tentative groupings and sailings period Can you handle them Group forty seven comma July eighth comma LEVIATHAN speed 19 comma meridian July twelfth period Group forty eight comma July ninth comma four troop transports speed sixteen destination Brest comma meridian July fifteenth period Group forty nine comma July tenth comma nine troop transports speed twelve point five meridian July eighteenth period Group fifty July fifteenth two troop transports GREAT NORTHERN[,] NORTHERN PACIFIC speed eighteen point five meridian July xx twentieth
Source Note: Cy, DNA, RG 45, Entry 517B. All three ships referenced in this cable were troop transports. The group numbers refer to specific convoys.