In this video I look at subs in Warplan, I cover:
1) Major role: Attacking convoy lane in Raider mode
2) How to create a Port Blockades of supply
3) How to set up your sub on patrol so it intercepts enemy fleets within a 5 hex radius
4) How they can attack in fleet mode, 5 hexes away.
5) How to attack them with air units from land base and CVs.
6) Beware: Coastal hexes are deadly to subs because they can be attacked by surface fleets as well as air units.