I never played vanilla choosing to go straight into a modded game. I run GWX 3.0 now, and in February 1940 I would look in BE61 for convoys to be coming from the South and turning to the NorthEast in that grid. I use that area as it is free of shore based aircraft at that time of the war, and far enough away from them, to allow a second, or third attack if you want. I can not say if vanilla uses the same convoy routes as GWX does.
