@Baron:
@Baron:
@Young:
I always liked the classic SBR rules where you roll a dice per bomber and take that amount straight from their cash on hand. Off the top of my head, I would do something like… 1 or more warships in a convoy zone allows for 1d6 to take cash.
A more conservative idea on Convoy disruption: a 5 IPCs cap per Convoy SZ (cost of one Submarine (as long as cost structure is accepted), as refence, the cheaper of the naval unit) on all of them. This is also the OOB average IPCs which can be lost in Convoy SZ.
Actually, the OOB average is around 4.6 IPCs per Convoy SZ.
The total IPCs lost due to all raids could not be more than what is outside a direct ground route to an individual Capital Power.
If at least 1 TT bordering a Convoy SZ is on enemy’s hand, this SZ can be raid.
If two Allied Powers share a Convoy SZ, the economical damage must be split as evenly as possible between the two according to the number of TT owned.
Also riping off the cash on hand is applied directly during attacker’s phase.
Instead of direct naval combat on enemy’s ships, Submarine can be able to roll 1D6 damage per Sub in a Convoy SZ on the attacker turn. This could be easy to apply if you use attacker’s Control Markers in the Convoy SZ as reminder.
Example, from Convoy Raid, UK Europe could lost everything except the 2+6 homeland IPCs.
Germany can only loose what is in Africa or Finland-Norway, and from a conquered UK, or any North American conquered TT.
USA can only loose money from Brazil, Islands TTs, and from others conquered TTs on Europe, Asia or Africa.
Japan can only save homeland 8 IPCs.
Italy could only loose what is in Africa.
URSS have nothing to loose.
Etc.
Warships as a whole fleet can raid an empty Convoy SZ for 1D6.
Each Submarine can either attack enemy’s warships and TPs in a Convoy SZ or raid the Merchant Convoy, for 1D6 damage.
(Some may prefer to keep the damage roll as OOB (1-3 IPCs/4-6=0 IPCs) and double roll for Sub,
but I wouldn’t recommend it, the avg dmg are too low: 1 IPC or 2 IPCs for Sub.)
**Each Tac bomber can raid an empty Convoy SZ for 1D6 damage,
Each Strategic bomber can raid an empty Convoy SZ for 1D6+2 damage.
But Fighter cannot perform any raid, here Merchant Convoy Raid.
All attack rolls must submit to a Convoy preemptive defense @1,**
coming from Destroyer Escorts, Corvettes and AA gun added on Merchants ships.
1 preemptive roll per each Submarine, TcB, StB or 1 preemptive roll for a whole fleet of warships.
To increase some kind of Convoy raid such as in Battle of the Atlantic and subwarfare, Submarine needs probably to be a able to fight both naval combat AND economic battle in a given round of play.
Here is my suggestion:
**Sub either attacks surface vessels and TPs OR makes a Merchants’ ships Convoy Raid (MCR)
in Convoy SZ, as suggested above, damage per Submarine unit: 1D6 IPCs taken from enemy’s hand.
But this time, defender can roll@1 against each Sub doing a raid, this picturing the Destroyer Escorts and Corvettes work.
Also, as YG suggested, I would make a warships group (from 1 to many units) able to do MCR if there is no enemy’s warship in the Convoy SZ. Damage is 1D6 IPCs for the whole group, which is also subject to Destroyer Escort defense, but only 1 single roll @1 against any number of attacking warships.
(This rule mechanic for MCR would be similar to SBR.)
In addition, Shipping Lines Disruption (SLD) is available to any Sub (no matter if it attacked or made a raid, or was on the move earlier in the turn) which is alive after NCM and still in a Convoy SZ.
Each Sub doing Shipping Line Disruption destroys 1 IPC from enemy’s hand.
This could simulate how Subs Staying on Station are ready to fall on any defenseless lonely pray passing by.
5 IPCs maximum still apply per Convoy SZ.**
This 5 IPCs cap can also be an incentive to scatter Subs in many Convoy SZs as much as possible to optimize IPCs losses.
In addition, this SLD for Sub make them more cost efficient on economic damage at sea:
avg 2.944 IPCs (1.944 per MCR+ 1 per SLD) VS StB 1.75 IPCs per MCR only.
StB would be better against isolated IC, avg 2.583 IPCs per raid and more (2.916 IPCs/SBR) depending on which SBR rule used.
According to both HR game mechanics I suggested, you can see both StBs (2.916 IPCs/SBR) and Subs (2.944IPCs/ MCR+SLD) would be statistically on par against their favorite target.
However, another feature is required to keep track of the IPCs loss per Convoy SZ.
For each IPC paid due to MCR or SLD in a given SZ, put 1 attacker’s Control Marker in this Convoy SZ.
When it reaches 5 markers (you can also use plastic chips under 1 Control Marker, each chip worth 1 so a single 5 red chip would mean that a given SZ has been emptied of goods), any additional IPC damage in this individual SZ have no effect.
That way, the raided player would have a mean to remember how much damage was taken per each individual SZ during the whole game round and how many powers made the raid.
Example, Italy in 1 Adriatic SZ can be MCR by UK and USA, if UK ripe off Italy of 3 IPCs and USA rolls for 5 damage, it will be easy to stop at 2 IPCs by looking on the number of UK’s Control Markers/chips.
I believe it is one of the situation which make Larry put Convoy Disruption just before the Collect income phase of a Power, instead of the attacking Power’s turn.