Hi jdrumsr a Warm Welcome to Subsim re GWX when playing the Campaign and searching for Convoys or Ships operate the hydrophones yourself you can pick up convoys 38kms away instead of the sonar guy only picking contacts up 8-12kms away also dive to periscope depth every 2-3 hours of game clock time.
Conserve as much fuel as possible 7knts (is deemed best for distance traveled and fuel used)on surface when heading for your patol grid.
Once in your grid set speed to 2knts on surface and at periscope depth dont just stay in your grid for 24hrs patrol that grid for 7-10 days or longer trust me the convoys are there you just gota find them.
theres no better feeling when you do a sonar sweep and you pick a single contact of high pitched screws of and escort then another and then the dull drone of merchants then when you look at the tactical map you have lots of contact lines also when you press ,. keys to the right of the M key you can flick through the convoy ships in gods eye mode.
Happy Hunting Sir Salute
