'CW' (i) was the designation of British coastal convoys (together with a numerical suffix) plying from Southend to St Helen’s Roads and Yarmouth, Isle of Wight, and thence Falmouth, and as such reciprocals of the 'CE' series (July 1940/May 1944).

The first of these 270 'Channel Westward' convoys was CW.1 of 6/7 July 1940 with 31 merchant vessels, and the last was CW.273 of 31 May/1 June 1944 with 31 merchant vessels and four escorts.