The sections are based on sailing experience when submarines were first introduced. The sections focus on maximizing chances of survival and inflict the most damage to enemy ships.

I enjoy helping others by writing about technical topics to a higher standard and provide key findings for a higher chance of success!

The guide is for everyone, but much friendlier to new players. Everything will be explained to be on the same level as those who are the most experienced. The writing will be easy to follow with plenty of screenshots for those who are too lazy to read everything!

Submarines are the sea wolves who silently lurk on the battlefield to pounce on their next prey.

Their natural hunter-killer abilities evade enemy fire while launching homing torpedoes that usually find their mark.

Each of the four nations have their own unique features that distinguish them from the rest.
The American sub is the most maneuverable ship and considered to be a semi-brawler at close range. Its equal torpedo tubes in both the bow and the stern allows the ship to address incoming threats much better.

The skill tree focuses on survival to live long enough to inflict most damage until the bitter end.

1. Liquidator
2. Improved Battery Capacity or Torpedo Crew Training (very risky)
3. Consumables Specialist
4. Torpedo Aiming Master
5. Adrenaline Rush
6. Enlarged Propeller Shaft
7. Superintendent

The only commander of a tech nation who can self-repair and be repeated multiple times.
The Resilient skill will ensure longer survivability since subs have no repair party consumables.

The most useful equipment for all tiers is the faster torpedo speed.

The next equipment is only available at tier 10.

The faster reload allows for more torpedoes to be launched.

Torpedoes depend on flooding to inflict subsequent lethal damage after their initial impact.

Survivability depends on minimizing damage and the ability to sail away from danger faster.

The submarine is the most cumbersome ship that needs to plan several moves ahead like a chess game. Positioning is everything as backtracking is nearly impossible.

A keen understanding of when to be aggressive and defensive is needed to know where the best place is. Every step must be carefully calculated to avoid the many hidden death traps out in the sea!

The submarine should tail behind a nearby friendly destroyer to gain while keeping some distance to perform either offensive or defensive maneuvers.

The first minute will determine a general idea of the enemy fleet after gaining enough intelligence data. Their locations will resemble a dot connect puzzle that will narrow down which path is the best to take!

The submarine must keep a safe distance that is roughly about ~80-90% of the torpedo's max range. The surrounds must be constantly monitored to avoid being overrun and deal with threats that can be the most problematic.

An overview of the threat level that each enemy ship poses:

Note: Their main weakness is close combat with any chasing ship or being detected early enough to be focus fired.

Each randomized map will have different number of islands that impede movement. Sectors like B should be avoided.
Safe space is calculated based on the submarine making a full figure 8 that will allow full maneuverability.

After determining a good spot, be prepared to ping the enemy ship on first contact.

Submarines operate most of their time on the surface to scout and maneuver at their fastest speed. The initial phase is to actively hunt ships while being cautious to not reveal own location.

The table lists how deep the submarine needs to submerge for each type of threat:

Note: Submerge ahead of time when an imminent threat is coming to avoid being detected.

An experienced submarine captain always has a escape backup plan to survive for another battle.


Note: Destroyers will require more patience to shake off if they are stubborn.

Hydrophones should only be used when no friendly ships are nearby to make the final determination. The ability's limited range does not always guarantee safe passage but provides a general idea where the pursuing enemy ship(s) are heading.

The submarine should be moving at all times when pinging enemy ships to avoid ASW damage. Pinging should only be at the sides and not directly bow/stern to make position much less obvious.

The submarine at a healthy distance away can engage multiple enemy ships to crowd control.
The sophisticated technique is effectively used on two ships at a time only:
1. Attempt to double-ping the 1st target ship as the bow torpedoes are launched.
2. Attempt to double-ping the 2nd target ship before the stern torpedoes are launched.
3. Refresh pings on the 1st target ship if damage control was used and is not a battleship.
4. Attempt to double-ping the 3rd target ship if either of the first two have sailed far away.
5. Rinse and repeat process for all enemy ships within range and prioritize low HP enemies.

Note: Best ambushes are at natural chokepoints or sectors to prevent capture.

These types of pings are used to distract and intimidate enemy ships to refocus their attention on own survival, change direction, remain pinned down behind an island.

This technique is best used on enemy ship groups that are larger than 2. This forces others to spread out that will thin their numbers to manageable levels.

Note: No torpedoes will be launched at 3rd+ enemy ship targets.

Homing torpedoes require at least one highlighted sector for them to properly connect with the target. If the enemy clears the sonar pings too soon, the pathway of the torpedoes are disrupted and miss entirely.

A solution is to delay the sonar ping until the homing torpedoes have reached at least halfway to the target. Torpedoes have a higher chance to hit when closer to the target despite clearing the the ping.

The lock-on homing mechanism works when the degree difference between the launched torpedo and the pinged target is less than ~75 degrees. When the target has at least one sector highlighted, the torpedoes do not need to be directly fired upon.
The submarine can shoot twice at the enemy ship by making a full turn to fire all homing torpedoes from both the bow and stern. The target still needs to be at least 90% of max torpedo range in the event that the enemy retreats.

This attack technique involves shotgunning (firing a full volley of torpedoes at close range) the enemy after sneaking up at periscope depth while being 2-3 km away.

Such risky attack move should only be used when no better alternative exists. The ideal target is a ship without hydroacoustic search and is either isolated or not closely grouped with the others.

The submarine needs to be retreating at full speed forward when being actively pursued. A fast surface ship like a destroyer or cruiser will prevent the ship from fully surfacing. Only the stern homing torpedoes can be used with the sonar ping.

Enemy submarines are typically fought at or around the same depth. Sonar pings are needed for those who are actively evading by changing depth.

Manual aiming without any pings are needed when the enemy is less than 2 km away. Homing torpedoes are still preferred because of being significantly faster than the standard ones. Highlighted sectors can disrupt the trajectory when fired at close range and is not recommended.

CV has the most accurate ASW planes and will automatically launch them upon sight or when a submarine ping is used.

The solution is to manually fire the homing torpedoes because the CV will immune to pings for a prolonged duration because of their powerful damage control.

The submarine is a stealthy and cautious ship hunter who does not take unnecessary risks. The limited battery power needs to be conserved until needed for emergencies or evasive maneuvers. The better decision in difficult situations is to choose life when possible to fight another day.

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