-10% to sonar reload time when the boat is detected by an enemy.
Liquidator
+30% chance of a torpedo strike causing flooding.
Helmsman
Within 15 seconds of using the Hydrophone consumable: -10% to the shift times of the rudder and dive planes.
Priority Target
The detection indicator additionally shows the number of opponents that are currently aiming at you with their main battery guns.
Incoming Fire Alert
A warning about a salvo fired at your ship from a distance of more than 4.5 km.
2
Improved Battery Capacity
+10% to the total Dive Capacity -20% Dive Capacity Recharge Rate per second.
Torpedo Crew Training
-15% torpedo tubes reload time while detected by an enemy.
Consumables Enhancements
+5% to the action time of the boat's consumables.
Preventive Maintenance
-30% to the risk of the main turrets [sic], torpedo tubes, steering gear, or engine becoming incapacitated.
Last Stand
The boat remains partially able to sustain speed and maneuverability with the engine and steering gears incapacitated.
3
Enhanced Impulse Generator
If less than 33% of the maximum dive capacity remains: +15% sonar ping velocity.
Sonarman
+25% to the duration of a ping effect on a sector highlighted once.
-15% to the duration of a ping effect on a sector highlighted twice.
Consumables Specialist
-15% to the preparation and reload time of the boat's consumables.
Watchful
If undetected, displays an indicator showing that the boat is within range of activated enemy Hydroacoustic Search, Surveillance Radar, or Submarine Surveillance consumables. If you change depth while the indicator is displayed, you may be detected..
For every 1% of HP lost, –0.25% to each of: * Main battery reload time * Sonar cooldown time * Torpedo tube reload time * Airstrike armament reload time * Secondary battery reload time.
Torpedo Aiming Master
When launching homing torpedoes at a ship with a sector that is highlighted twice, torpedo damage is increased. The sector highlighted twice needs to remain active until the torpedoes hit the ship. +15% to torpedo damage.
Sonarman Expert
When a sector is highlighted within 30 seconds of using the Hydrophone consumable: +25% to ping effect duration.
Improved Battery Efficiency
If less than 50% of the maximum dive capacity remains: +25% Dive Capacity Recharge Rate per second.
Enlarged Propeller Shaft
While less than 50% of the maximum dive capacity remains: +18% to the boat's speed on the surface and at periscope depth.
Key: ★★★ - Extremely Useful ★★ - Frequently Useful ★ - Occasionally Useful No stars - Not Useful