My submarine's radar and ESM mast detected a foreign subject approaching the Azur Lane military base. Based on the wavelength detected by the surface radar, it was a row of Siren submarines preparing to launch a surprise attack in the second wave.
The exit of the Azur Lane military base was heavily guarded by the Military Police ship due to the Royal Navy shipwreck incident.
If I leave this place without a clear reason, they will attack my submarine without warning.
"Ugh... This is going to be so troublesome," I grumbled a little to break the silence.
Sofia and Jimmy Carter prepared the interception route for the Siren submarine on the Tactical Map Operation screen. The depth of the sea and the temperature of the seawater greatly affect submarine combat. There are two rules that must be considered for submarine combat, namely attack strategy and defense mechanisms from attacks. Detecting enemy submarines and avoiding enemy submarine detection are common battles experienced by submarines.
The outcome of the battle lies in the information of the sea that is the battlefield. Mistakes in diving and small carelessness will be fatal attacks. Unlike surface ships, submarines are not designed to receive fatal damage to the vital points of the submarine. Small damage will expand quickly due to the seawater pressure that changes the submarine's frame structure.
So, I planned to avoid detection by the siren submarines and sink them before they noticed my submarine.
Beep...
Tiiit..
My submarine's radar and ESM mast became silent. The small dots that were monitored in the radar range had disappeared completely.
"They have obtained enough data for a surprise attack and are diving again," said Jimmy Carter while marking the last position of the foreign subject detected in the surface radar range on the Tactical Map Operation screen.
I had a bad feeling about the strange movement of the sirens. Their movement of launching submarine units before attacking was a strange anomaly that rarely happened in previous siren invasions. The strength of the sirens lay in the technology and the number of mass sirens that supported the attack. Techniques such as collecting data and sending submarine units to conduct spy actions were new to the sirens.
Unless.. If it was related to the death of the Arbiter Temperance who had become the USS Jimmy Carter or something that changed their actions.
"Could it be... This has something to do with you, Jimmy Carter?" I asked.
"Unng? Why?" Jimmy Carter replied with a confused expression.
I looked at Jimmy Carter's face which was dripping with thin sweat and deleted several interception path options that had been made.
"Their movements look very strange, don't they?" I said while looking at Jimmy Carter.
"Our attack strategy will change from the previous tactics, this siren has evolved from before," I continued.
"I can't deny it. The siren's movements this time are moving with great caution. Most likely, they think that the USS Enterprise that defeated me is at Azur Lane's main base," Jimmy Carter replied.
"Or... Something has happened and made the siren feel confused with the situation that has occurred. Master.. a few hours ago, Azur Lane's emergency radio frequency received an emergency signal from the USS Enterprise," Sofia explained her findings by playing the sound voice that my submarine had successfully steal in radio wave.
The sound recording played by Sofia came from the Eagle Union Fleet with the Flagship USS Enterprise. On their way back after conducting a routine patrol within 200 nautical miles of the Azur Lane exclusive zone, they discovered a very strange siren activity. Several mass-produced sirens moved in groups and formed a formation as if to attack something. The USS Enterprise took special measures to follow them and realized the distance the sirens were traveling toward the Azur Lane main base.
The battle between the Eagle Union Fleet led by the USS Enterprise and the siren convoy was inevitable. The last report from the USS Enterprise radio transmission explained the purpose of the siren attack because one of the Siren Elites failed to search for an object stored by one of the Azur Lane Admirals.
After listening to the USS Enterprise radio transmission which ended with an explosion, an emergency signal was sent by the USS Enterprise. The Azur Lane party which had problems in the previous incident formed a special fleet to carry out a rescue operation. That was a big gap for me to get out of this place and hunt down the detected siren submarine.
"Good job, Sofia!" I praised Sofia and stroked her hair.
Sofia accepted my caress with a wide smile and a glare that seemed to mock Jimmy Carter.
A small fire and electric sparks occurred between them...
Or was it just my imagination?
However, this room felt hot with silence staring at each other.
"Umm... M-Master... I found a small clue about the attack that would be carried out by the siren submarine. If they use old tactics that are suddenly updated, there is a possibility that the Siren Elite gave attack instructions behind the scenes. The siren submarine will attack in groups according to the Siren Elite's instructions via digital transmission. We need to capture the digital transmission used by the siren submarine to get their location point," Jimmy Carter's explanation sounded reasonable.
Submarines are not the type of lone unit in carrying out attacks involving large targets. In the history of submarine attacks that penetrate enemy defenses with sudden attacks, their movements involve a group of submarines to attack at one time. A real example of this attack was implemented by the Nazi German submarine, they developed a submarine unit that moved in the "Wolfpack" formation.
However, for submarines in the modern era. Using the Wolfpack formation was a fatal mistake due to the noise level and vulnerability to detection if moving in a group. The development of submarines that rely on stealth and underwater detection gave birth to an underwater killing machine that is very effective in disrupting surface ship convoys. However, it does not make submarines a lone unit because of certain limitations experienced by submarines.
Jimmy Carter showed a small gap in the movement of the siren submarine, the Tactical Map Operation screen, and my surface radar showed red dots in fairly shallow sea depths.
Seeing the data shown by Jimmy Carter, I understood the small gap she meant.
"So that's it, I understand now. They can't dive more than a hundred meters?" I asked.
"That's right, Master. The siren technology for mass-produced submarines can only dive to a depth of 50 meters. However, the Siren Elite has a siren submarine system. Ugh... I don't want to meet them, especially in a situation like this."
"Eh? What's wrong with the Siren Elite using the submarine system?" Sofia asked.
"They are very troublesome. The ability to dive and move under the surface of the sea is very different from the mass-produced siren submarine. We need a lot of underwater explosives to lure it out of the sea," Jimmy Carter replied.
"..."
"..."
Sofia and I were stunned after hearing that explanation.
Slowly... We chuckled and looked at Jimmy Carter with a thin smile.
"Eh?" looking at us who chuckled. Jimmy Carter's facial expression was filled with curiosity and small questions that wanted to be asked.
"Jimmy Carter... Pay close attention... Our submarine has almost the same technology as the Siren Elite. The USS Seawolf is designed to move quickly to attack targets, has an unlimited range patrol route, can dive under the surface of the sea without surfacing for months, and the only thing that limits this submarine is... " I stopped my words by taking a deep breath.
"Ammunition and Food supplies... " I continued.
After I said that sentence, a loud stomach sound was heard from Jimmy Carter's stomach.
"And the first rule after becoming a ship girl is that the needs of the stomach must be taken care of, especially as a gentle and innocent girl," I said.
Hearing my words, Jimmy Carter's face dropped dejectedly after her stomach growled loudly. Jimmy Carter's adaptability was quite fast but had limitations to the general instincts that humans had. Trivial things like eating, sleeping, and cleaning themselves were foreign to Jimmy Carter.
That's why... Sofia and I taught her until she could meet with the other girls.
Well, my work continues to increase and my need to take care of them continues to increase.
Especially with Jimmy Carter's body shape, I'm very worried that there are wild predators targeting her body.
Well... Do I need to teach her how to remove traces of human corpses?
I can only hope that something like that won't happen.