What sources did you read stating that active sonar was used 24/7? I know from various sources I have read regarding American doctrine during the time that banging around with active sonar constantly was considered a tactical mistake because it telegraphs the position of the convoy the escorts are protecting to the sub well beyond ASDIC's maximum effective range. I remember several stories, including one from one of Dick O'Kane's books stating that they found convoys because escorts were blindly banging its active sonar, letting everyone know where they were.
Likewise, the only advantage to constantly using active sonar is to compel subs to remain outside the ASDIC range. A fortunate sub skipper can launch a torpedo from long to extreme range and still get kills.
I doubt seriously this was an error on the game's part. I would really like to compare sources to see if it is possible to reconstruct the actual ASW doctrine regarding this issue.
