To those of us who find the idea of the dedicated surface raider to be intriguing. One of the problems in putting together a campaign for surface raiders is that there are more issues for them to face than just armament, protection, speed and endurance that affect their design and potential for performance. The Deutschland class was a valiant effort at designing a dedicated surface raider, but radar and small carriers meant that its time was coming rapidly to a close. Nevertheless, it had a window (albeit a closing one) in late 39 through mid 41 when the RN had pretty much equipped its cruiser force with SW radar. And its design gave it the ability to outshoot cruisers faster than it and run away from capital ships slower than it at the time. But it still had an Achilles' heel when faced with cruisers that minor damage to would end its cruise. At River Plate the RN failed to inflict serious damage on the Graf Spee's armament or hull but the damage they did inflict meant that her cruise was over. And what was this career ending damage? It was the damage to her desalination plant and her fuel filtering equipment. The first severely limited her ability to provide fresh water and the second the ability to keep her diesel engines running without a refit. In fact, Langsdorf felt that her engines were unlikely to be able to get her to Germany in their present state.
I propose a simple rule (or means) to address that. When a Panzer Schiff takes any hull damage (including a half box); roll a D6. On a 6 result the Panzer Shiff has suffered damage to one of these installations. Roll another D6 and odd is the water plant and an even is the oil filtering plant. The Panzer Schiff may repair as per an engine hit including breaking it permanently. A second hit before the repair occurs destroys the plant permanently. In other words, treat it like an engine hit. The Panzer Schiff's cruise is over if that occurs, and it must RTB in Germany.
My reasoning for the above is that Harwood's Force felt that they might as well have been throwing snowballs at Graf Spee for all the apparent damage they were causing her and yet they had unknowingly already ended her cruise.
WMC