When an aircraft is spotted, every second counts. Keying the crash dive command and immediately setting your planes to "hard dive" can be the difference between escaping or being destroyed by depth charges.
Historically and in-game, U-boats were most dangerous when used as "submersible torpedo boats." Attacking on the surface at night gives you a speed advantage over most merchant ships and makes you very hard to spot. Stiller Jäger 3
Your crew isn't just a background element. You must rotate shifts to avoid exhaustion. Assigning officers with specific "medals" or "qualifications" (like "Torpedoer" or "Watchman") significantly boosts the efficiency of their respective compartments. Strategic Tips for Survival When an aircraft is spotted, every second counts
When being hunted by destroyers, toggle "Silent Running" immediately. This stops all non-essential repairs and reloading, which are noisy and give away your position to enemy sonar. Your crew isn't just a background element
This is the heart of the game. Instead of relying on the "locking" feature, you manually input a target's range, bearing, angle on bow (AOB), and speed. Mastering this allows you to fire from long distances or difficult angles where the auto-targeting often fails.
While tempting to use against defenseless merchants to save torpedoes, the deck gun is useless in rough seas and leaves you vulnerable. Only use it when you are certain no escorts are nearby.