Use existing maps, ie, roll random map, starting zone, one controlled, select a direction. If a new random map is rolled, new sector, if reused one - open water.
TF1 independent squadron Orzel 12 TF2 cruiser squadron *Averoff 17/17 Illmaren 15/32 Vainamoinen 15/47 (twins of turku SA, can exceed the tf limit by this units value) Gotland 10/57 Canaris 12/69 Galicia 12/81 Sultanhisar x3 21/102