How Swordfish attacked submarines

If a Swordfish found an Axis submarine, would its gunner board it?

No; the aircraft would attack with depth charges, rockets, bombs, or sometimes a torpedo.

The humorous prompt imagines a Swordfish boarding an enemy submarine before turning to the aircraft's real anti-submarine options. Depth charges were the most recognizable weapon for a submerged or diving target. Rockets and conventional bombs offered alternatives when the attack geometry allowed them. Torpedoes could also be used in some circumstances, showing how the slow biplane's utility came from adaptable stores and low-speed handling.