Under the surface of the sea, a sonar beam rumbled non-stop.
The roar of the water that was drowned out by the noise of the sonar caused one of the sonar devices belonging to one of the ships destroyers from the Eagle Union Main Fleet damaged. This happened because they were chasing the siren submarine that suddenly attacked the Azur Lane main base.
Moving a number of fleets that were ready to fight carrying depth charges, they began to hear sounds coming from the depths of the sea.
The results of the detected sonar beams were very noisy and responded to each other without leaving a single gap.
Without them realizing it. It was an active sonar beam from the Seawolf submarine torpedo guided by a fiber optic cable. They were like cats chasing laser light fired by humans to play with the cat's visual perception.
Hearing the noisy sound of the sonar beam reported by the destroyer escort, Baltimore frowned with cold sweat dripping down her head.
"What kind of bad feeling is this?" Baltimore said while observing her ship's sonar device.
As a shipgirl using a heavy cruiser ship device, Baltimore should not have the ability to use her ship's sonar to its full potential. But that was what made her heart feel fearful and bad.
"Why my ship's sonar can sense sonar beams from various directions?"
Like a sign of a bad feeling, her radio transmission suddenly received a voice message that entered all of her radio frequency channels.
[ To all shipgirls who enter our attack range. ]
[ We only advise you to leave our attack range! ]
The warning voice was heard on the radio transmission of the Eagle Union main fleet.
Kabooomm!!
Right after the voice said that an underwater explosion sound was suddenly felt on Baltimore's ship. Seeing the source of the explosion not far from her ship, Baltimore felt scared as if her ship had entered a sea mine area planted by a siren.
"What was that explosion?" shouted one of the destroyers named USS Spence.
One of the destroyers escorting Baltimore sent a flashing light signal indicating a confusing underwater contact.
"This is USS McCall, I have an underwater contact with an active sonar beam approaching!" shouted the destroyer McCall, who reported the discovery of her active contact approaching from the sea.
Brrtttt...
Whhiirrll...
An unknown torpedo suddenly passed through the Eagle Union main fleet and caused some other ships to move in evasive formation.
"That torpedo almost hit me!" shouted one of the escort ships that moved to evade by breaking the Eagle Union main fleet formation.
Swiirrll...
Brrttt...
Before their radar and eyes, the torpedo attack that passed through the Eagle Union main fleet suddenly changed its torpedo path until it approached one of the escort ships named USS Craven.
Until that torpedo exploded.
Kaboomm!!
The explosion of the torpedo and the shock of the sound shock wave caused several Eagle Union escort destroyers to increase their alertness by forming a wide-tiered formation.
Once again, a radio transmission that spread from all radio channels was heard again.
[ Sorry about that, its our intention to warn you guys to get out of our hunting grounds. ]
[ Ohh.. Forgive the behavior of one of my little sisters, Teehe~ ]
Hearing the sound of the radio transmission warning of a hunting ground, it had clarified Baltimore's bad feeling that had previously given the USS Seawolf a gap to chase the siren submarine.
"USS Seawolf, is that you?" Baltimore said as she entered the open radio transmission to answer the communication.
[ No, we are a ghost unit called... ]
[ ... Seawolf Program. ]
The answer to the radio transmission surprised the Eagle Union main fleet that was moving information into the Seawolf-class hunting ground.
"Please allow us to go hunting the siren submarine with you to avenge our Admiral!" Baltimore shouted in a high tone.
"..."
"..."
"..."
A sudden silence fell within the open radio transmission. There was only the sound of unclear static radio transmission that could be heard in Baltimore's ears. Her heavy cruiser rig is actively searching for radio signals intended to hear the warning sounds of the Seawolf.
[ No. ]
[ You are only allowed to leave our hunting area before... ]
When the radio transmission returned and answered Baltimore's words, suddenly her radar caught several unknown contact signals originating from the sea surface contract.
Piiiissshhhh...
The sound of several foreign objects suddenly appearing from the sea surface had surprised several Eagle Union ship girls.
Without warning and detected by them, a number of four submarines appeared from the deep sea to surface sea with flying flags that had the Eagle Union symbol and a black wolf head flag that was biting a torpedo in its mouth.
"S-Seawolf?"
"Wait, this is the Seawolf submarine program?"
"Why is there a Seawolf submarine that is not detected by our escort destroyer?"
"Eh? What happened?"
"Have we entered the hunting area of the Seawolf who is famous for not understanding the meaning of the word ... Mercy?"
"Are we going to drown after entering the area surrounded by the Seawolf program?"
One by one the open radio transmissions of the Eagle Union main fleet were heard and answered each other about their uncontrollable situation.
In the darkness of the night, they could not see the sea conditions clearly, they could see four submarines that were part of the Seawolf program shadowing them closely.
[ They will lead you to open areas. ]
[ It can be said, that our hunt is a little dangerous because the siren submarine has a stealth ability that deserves more attention from us. ]
[ For the sake of mutual safety, we suggest leaving our sterile hunting area. ]
The open radio transmission immediately ended the conversation and their sonar now observed the Eagle Union submarine registered as the Seawolf program.
Baltimore only smiled wryly when she saw the four Seawolf submarines that guided them out of the Seawolf hunting zone.
Their pride as the main fleet of the Eagle Union was slightly tarnished when the brief threat managed to make their courage shrink to fear.
The appearance of the Seawolf fleet that was not detected by them before showing themselves had given them a hard blow from the existence called the "Seawolf Program."
"So, this is the Seawolf program that is intended to hunt sirens without being detected by radar and sonar?" Baltimore said as she observed one of the Seawolf submarines nearby.
"They are..."
"Too scary to be left running unchecked."
"No wonder the Seawolf program was stopped by the Admiralty Code."
Baltimore, who served as part of the Military Police from Azur Lane, could only be silent seeing their terrifying abilities.