Just looking at the atlantic for now
SZ 124 is a 2 ipc zone for russia
SZ 118 is a 1 ipc zone for russia
remove 1 ipc from urals
SZ 104 is a 2 ipc zone for uk
SZ 117 is a 1 ipc zone for uk
remove 1 ipc from alberta and 1 from ontario
Only the named allied countries can receive ipc’s from their zones.No allied ships need be present to collect income. Any axis naval vessel present in the zone negates the ipc value.
This would give russia a potential 2 ipc boost per turn and would germany a chance to knock russia down 1 ipc per turn.
UK could receive a potential 1 ipc boost per turn and would give germany a chance to knock uk down 2 ipc’s per turn.
How it would effect game play? The 1 pc zones would probably only be threatened in the early rounds. Although germany would have the option to attack from SZ 124 if present in that zone. Germany wouldn’t be in a position to trade subs for destroyers out there, so probably little impact while still providing a sub that ended up out there a chance to do some damage. The convoy zones in uk and scotland are easily defended due to their airbases. The 2 ipc zones germany could trade subs for destroyers giving her a 2 ipc advantage which is then countered by the 2 ipc zone for basically a wash, although against uk germany could get a 1 ipc advantage.
Germany would have to commit 12 ipc’s to counter the allied bonus which means that’s 12 ipc’s not going to russia. She could choose to ignore it and send them towards russia anyway, but at 3 ipc’s a turn should at least make her hesitate. UK/US could also ignore german subs with only a 1 ipc hit to uk. If germany does contest the zones the allies would be able to effect the number of ipc’s going to russia early through UK/US destroyer and air builds.
Seems like more of an advantage for the allies. Should russia lose another ipc the same as uk? The allies could end up losing 2 ipc’s a turn but would be able to slow the german adavance on russia. Would it end up slowing it too much? Germany would have to keep a couple bombers in the west as well. While not a problem early on when moscow comes into bombing range it could make a difference.
Anyway just some thoughts.