Crash Dive 2 -

: On Sim difficulty, there is a standard 20-second delay for the crew to clear the deck. A "crash dive" (initiated by long-pressing the dive button) cuts this to 10 seconds but introduces a 25% chance of flooding a compartment and a 10% risk of losing a crewman .

According to the official documentation and veteran players: Crash Dive 2

: Launching from periscope depth creates wake trails that lead enemies to you. For stealth, it is often recommended to acquire targets at 100 meters depth where possible. : On Sim difficulty, there is a standard

: Visibility is influenced by weather, time of day, and your sub's profile. Pointing your bow or tail directly at an enemy makes your silhouette 25% harder to spot . For stealth, it is often recommended to acquire

: When submerged, you can utilize thermal layers to hide from enemy sonar, a critical strategy for evading tenacious escorts.

: Detailed threads on Subsim offer tactical advice, such as how to effectively attack fuel dumps and manage sim-level difficulty. Key Tactical Mechanics