32. When no escorts are around (lone merchant, most of the time), be patient and save ammo. Many ships take 30+ minutes to sink and more often than not your first torpedo will slow down the ship enough that you can easily follow it even submerged (if it is armed). My suggestion for lone merchants: two initial torpedoes for large ships (> 8-10 k tons), one for smaller ships. Wait 30 minutes and shoot one more if needed. Repeat until ship sinks. When conditions allow it (target unarmed, good weather), use the deck gun instead, after the initial torpedo(es): fire 5-10 rounds, wait 10-20 minutes, repeat until target sinks.
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