Tigerfish's uneven ASW and anti-ship record

How good did Tigerfish become compared with other heavyweight torpedoes of its period?

It became a good anti-submarine torpedo, but its anti-ship reliability lagged, helping explain why Conqueror used older Mark VIII weapons against General Belgrano.

Tigerfish became a capable heavyweight submarine-killing weapon after improvement. Its reliability and effectiveness were less convincing in the anti-ship role, which had been added and refined later. Spearfish would become its successor, but Tigerfish remained relevant during the transition. HMS Conqueror's use of older Mark VIII torpedoes against General Belgrano illustrates the preference for a proven weapon designed to break a surface ship's back. The comparison warns against treating a torpedo's overall reputation as identical across submarine and surface targets.