Bremerhaven Pocket: Sub attack!
A pocket has formed around Bremerhaven cutting off NATO forces from ground supplies turning to using convoys to send supplies and reinforcements to the pocket.
Your submarine has been tasked with hunting down this convoy and causing enough damage before extracting from the area!
Bad weather and seas has come over your area of operations make use of your sensors and smoke on the horizon to find the enemy convoy and sink at least half of the transports.