Jervis Bay shows gun fit against merchant targets

Was Admiral Scheer's attack on convoy HX 84 a success if HMS Jervis Bay delayed her for so long?

The outcome looks poor for Scheer, partly because heavy 11-inch guns were poorly matched to a thin armed merchant cruiser.

A Town-class cruiser could probably have destroyed HMS Jervis Bay much faster than Admiral Scheer did. The paradox lies in their weapons: 11-inch guns were meant to fight larger ships, while an armed merchant cruiser could be thin enough that some shells passed through before doing cumulative damage. The Jervis Bay action is therefore a practical lesson in target type, shell effect, and commerce-raider performance.