Thought about the history of the naval war in Europe some last night --
What prevented the British Navy being used the way I am doing it --
I see two things preventing capital ships from coming close to the coast submarines and planes
If we look at the Battle of Calabria we see that the Italian High Command would not commit capital ships without destroyer escort Indeed, it would have been considered criminal to commit capital ships anywhere without destroyers (it was not done until late in the war (US Navy sends out Indianapolis, and look how that turned out)
In the Med, or the North Atlantic no way
Dale has added the harbour bombing which is critical I think but lets continue on this path
One of the most important dynamics of the Naval War in Europe the Brits never had enough destroyers In RtW I never use them. So one of the important aspects would be to fix the relationship between subs, capital ships and destroyers
The first way is to alter the relationships between the ships strengths
Proposal
Subs -- very strong against Capital ships (BB, CA, CV) +200%
-- weak against destroyers 50%
Destroyers -- strong against subs +50%
Capital Ship -- cannot see subs, cannot attack subs
Transports should not attack and I think a defense of 15 is high they should be like workers dead if attacked, last unit to defend -- Currently the AI will run around attacking subs and destroyer with stacks of Transports YUCK
Transports cannot attack and max defend of 3
The above changes force all transports to be escorted and prevents transport strike forces --
This would go along way to fixing the problem however, there are some problems with this In the Pacific war the US subs were handicapped by the torpedoes not working maybe the way to handle this is that the base Sub strength is low but Germany and Italy get Sub experience from Naval Yards
Or a Quest that is triggered after USA builds 10 subs --then must sink five transports
Then all US subs get a promotion that restores attack stength
To add historical flair, and show how we might use elements other than new units:
Two new elements
A new Espionage mission
Sink ships in Harbor
This is modeled after the Italian frogman attack(s)
http://en.wikipedia.org/wiki/Decima_Flottiglia_MAS#Chronicle_of_Operations
in Alexandria harbor
or the attack on the Tirpitz in Norway
http://en.wikipedia.org/wiki/British_commando_frogmen
A New random event
History German U boat in Scapa Flow (U-47)
Sub infiltrates harbor
Requirement
No destroyers in Harbor
Capital ships in Harbor
Result 1-2 capital ships sunk (double amount if no Naval base)
Advantage here is that you must build have destroyers with your Capital fleets to prevent this sort of attack
These changes would nicely represent the problems the British faced with destroyer shortages