I think that allowing the aircrfats to sunk sub without retaliation from the subs makes the subs completely useless as “sub” but useful only as “naval cannon fodder” and relegates the DD to a secondary role.
In our f2f revised games a tipical fleet is composed of x BBs, y ACs, 2 * y FIGs, n TRNs, m SUBs, 1 DD (the flag ship?). Only time in which I see more of one DD it is when someone developed combined bombardment. I usually play without technology so go figure how many DD we use in our games.
According to me, with anniversary rules we are going to see two “historical” behaviour:
- DD have to be bought in larger quantity because TRNs and SUBs are not useful as cannon fodder;
- DD have to be used to hunt SUBs.
This means that we are going to see fleets more similar to the real WW2 counterpart: few Capital Ships escorted by a lot of DD. (Usually a good DD screen for Capital ships involve 3-2 DD for each Capital ship). Moreover subs should operate alone or in groups of subs, and who want to use the sea as a way to transport land units have to fight against subs.
I know that historically aircraft where used against subs, but also DD where used in great quantity for patrolling the seazones and for escorting convoys.
Moreover they were dedicated aircrafts, as said in the quote on ASW Tactics you proposed.
The dive bomber and torpedo bomber on the Attack Carriers of the USA Pacific Fleet were not intended for sub hunting.
Escort Carriers were equipped with aircrafts used for patrolling and for attacking sub.
Furhtermore the aircrafts were useful to force the subs to stay submerged. A submerged sub, in fact, is completely safe from air attack, only a DD equipped with depth charges may try to hunt a submerged sub.
For example the USS Cavalla, a Gato class submarine, sunk a Japanese Fleet Carrier in the Battle of The Filippine Sea, in the face of aircrafts and DDs of the Japanese Combined Fleet.
On her maiden patrol Cavalla, en route to her station in the eastern Philippines, made contact with a large Japanese task force 17 June. Cavalla tracked the force for several hours, relaying information which contributed to the United States victory in the Battle of the Philippine Sea (the famous “Marianas Turkey Shoot”) on 19 – 20 June 1944. On 19 June she caught the carrier Shōkaku recovering planes, and quickly fired a spread of six torpedoes for three hits, enough to sink Shōkaku at 11°50′N 137°57′E / 11.833, 137.95. After a severe depth charging by three destroyers, Cavalla escaped to continue her patrol. The feat earned her a Presidential Unit Citation.
(Quote taken from: http://en.wikipedia.org/wiki/USS_Cavalla_(SS-244))
Also in the Mediterranean German U-73 managed to sunk the UK Aircraft Carrier Eagle, 11th of August 1942.