National Convoy Disruption House rule for 1942.2 OOB cost structure
Originally, this House Rule was make for a reduced naval cost structure SS5-DD6-CA9-CV12-BB15 to help balance the higher loss of money for Naval Power (UK, USA, Japan). It may requires some alternate ways to infuse more IPCs into the game to keep balance. IDK (Never play-tested with OOB cost structure.)
First thing, Convoy Sea Zones (SZ) have to be identify with owner’s Control Markers.
All Convoy SZs worth 4 IPCs and are bordering at least 1 Territory (TT) or have an island group in it.
These TTs can worth 0 IPC to many IPCs, this doesn’t change the 4 IPCs Convoy SZ basis.
Here is Convoy SZs for 1942.2, I would suggest to implement (some, such as SZs 2, 3, 4, 45, 53, 57, can be considered as Allied lend-lease shipping SZs coming from either UK or US toward Russia or Australia / others should be considered as import-export lines of shipping) :
USSR 24 IPCs
1 SZ x 4 IPCs = 4 IPCs max.
SZ 4 (Arctic Sea: Karelia & Archangel)
United Kingdom 31 IPCs
8 SZs x 4 IPCs = 32 IPCs max.
SZs 3 (Iceland), 7 (Northern UK), 8 (Southern UK),
SZs 10 (Eastern Canada), 23 (West Africa),
SZs 34 (Egypt, Saudi Arabia, Persia), 35 (India), 45 (North Eastern Australia)
United States 42 IPCs
9 SZs x 4 IPCs = 36 IPCs max.
SZs 2 (Greenland), 11 (US East Coast), 18 (Caribbean), 22 (Brazil),
SZs 53 (Hawaii), 55 (Mexico West Coast), 56 (US West Coast),
SZs 57 (Midway), 65 (Alaska/Western Canada)
Germany 41 IPCs
2 SZs x 4 IPCs = 8 IPCs max.
SZ 5 (Baltic)
SZ 15 (Italy)
Japan 30 IPCs
7 SZs x 4 IPCs = 28 IPCs max.
SZs 36 (Malaya), 37 (East Indies), 47 (Borneo),
SZs 48 (Philippines), 60 (Japan), 61 (Costal China), 62 (Korea)
The most important thing to note :
lf at least 1 territory bordering the Convoy SZ or the Island group within the Convoy SZ is taken from his original owner and the Convoy SZ belongs to the same owner, then this Convoy SZ is deactivated and can no longer be raided by enemys of the original Convoy SZ owner’s which have his control marker in this Convoy SZ.
When such Convoy SZ is deactivated, simply flip this Nation Control Marker face downward.
For instance, if Germany conquered Karelia and/or Archangel, the Russian Convoy SZ4 can no longer affect USSR until this Power recovers these two TTys.
- Only Submarine can raid Convoy SZ.
During Phase 3: Conduct Combat
1. Strategic bombing raids AND/OR Convoy Disruption
Each Submarine can either make a regular attack (Step 3. General combat) or a Convoy raid (Step 1. SBR AND/OR Convoy Disruption).
Even if there is warships (including DD) in Convoy SZ, a Submarine can still make such raid.
Once the raid is done, Submarine cannot retreat and must stay in raided SZ.
Each Submarine unit can cause damage from 1 up to 4 IPCs (1D6+1: 1-3 = 1-3 IPCs / 4-6 = 0 IPCs + 1 damage)
So a single Submarine always does at least 1 IPC damage (50% of the time, and more the other 50%).
There is no defense roll and any enemy Destroyer within the SZ cannot do anything about it.
It is up to the Convoy SZ owner’s to use Destroyers (and more) on his turn’s attack phase to sink Subs.
These damage and odds are for these units:
6 IPCs Submarines, A2 first strike D1 first strike M2, Convoy Disruption damage: 1D6 (1-3= 1-3 / 4-6 = 0) +1 IPCs.
8 IPCs Destroyer A2 D2 M2, cancel on a 1:1 basis Sub’s Submerge and Stealth Move but a single DD cancel all Sub’s First Strike.
Damage are immediately remove from Convoy owner’s hands, never more than 4 IPCs per SZ for the whole game round.
And attacker must put chips under owner’s National Control Marker (1 chip per IPC damage) as a reminder for the game round of how many IPCs were raided in this specific SZ if multiple raids occur from more than one alliance powers.
These chips will be removed from under National Control Marker in SZ during Convoy SZ’s owner 1. Purchase and Repair Units. Step 2: Pay for Units and Repair Damaged Units and Facilities.