@General:
I love house rules they add a little flair to the game. But, I am hesitant to adopt ideas that take the current combat system in more of a tactical direction. Historically aircraft were the real sub hunters and really increased their success rate with the use of radar. DDs usually are reactive to a subs presense when the sub attacks something. Now the DD is a sub hunter. Per your example 5 SS vs. 1 DD & 5 bombers, those subs out by themselves instead of acting as fodder for my battle fleet are either threatening something or trying to draw your eyes away by sacrificing themselves. The use of needing a DD present might abstractly represent radar tech for those aircraft. Radar + aircraft = Big problems for subs. If I put 5 SS out by themselves within range of aircraft and DDs I hope it is deliberate on my part to draw your priorities for those 5 bmbs away from what I am worried about other than a dumb placement. War is hell. After the first shot is fired most battle plans can be thrown away and then you place your trust in morale, training and initiative.
I agree with you on these two statements:
Historically aircraft were the real sub hunters and really increased their success rate with the use of radar.
DDs usually are reactive to a subs presense when the sub attacks something.
Now the DD is a sub hunter.
Do you see this as a problem?
I’m not sure to understand what you imply about the 1DD+5StB example.
ideas that take the current combat system in more of a tactical direction.
True that what CrusaderIV and SS are talking about is effectively adding a little tactical element.
My opening post and taking account of the HR of Knp7765 was more intended to fit into the actual strategical level rules.
About the Air Search Patrol
I think it is intended to bring back a more historically accurate anti-sub role for aircrafts.
The new OOB rule for DD+Air is quite weirdo in itself, forbiding planes all alone to attack subs in a SZ is completely inaccurate.
Adding an Air Search Patrol phase before planes all alone can directly hit subs, let the subs little more chance to survive and not just be sitting duck (as it was in classic A&A).
I played once a game with Air Search Communication in which planes have to roll “1” or “2” to detect a subs group.
And it needed only 1 success roll amongst them all to let all planes make a regular attack on subs: Fg A3 and StB A4.
There was also an Anti-Sub Mission made by DD and Destroyer escort, in which each have to roll “1” or “2” to detect a subs group and pin it. But only the successful DD or DE unit in the previous phase can get a chance to destroy a sub at A@2.
So this HR clearly made the difference between looking for subs with planes or with warships (DD/DE).
Planes were much more successful as long as you bring more than just one unit in the ASCom.
It brings a much more historical feel.
But still then, subs have a better chance to survive than when you bring 1-2DD+ a lot of planes in a SZ if you follow OOB rules,
you can clear in a single round all subs with few loss.