On my 5th patrol, S of Palau, 22nd March 43, a single old split freighter came across my way, early morning, still dark, fair weather, bit waves, no good for magnetic setting.
Fired one torpedo, hit her, reducing her speed from 10 kts to 6. Ship started evasing manoeuvers. Fired a second torpedo, hit her, bur she was still afloat, appeared to try to turn around heading back where she came from.
Fired a 3rd torpedo, hit her, still afloat, but her bow was already pointing downwards. So I decided to fire a 4th torpedo.
As the 4th torpedo was on it's way, the old split freighter started to sink. But the 4th torpedo also hit her in the bow.
Then I checked my logbook and I was credited with...... 2 sinkings!
One was the Large Old Split Freighter, 8,213 tons.
The other was...... the liferaft, 0 tons