 The " Allied Naval and Marine Forces " was a newly formed department created with the purpose of conducting raids and operations along the coastline of German @-@ held territory . The organisation was able to command extensive resources from both the Royal and French navies and was commanded by Admiral Roger Keyes and his deputy , Commodore Hubert Lynes . Keyes , Lynes and their staff began planning methods of <unk> Bruges in late 1917 and by April 1918 were ready to put their plans into operation . 
