KSGU:Volume 6 Chapter 1

Chapter 1

Part 1

The voice that was heard from the headphone sounded like water flowing under the floor. Swoosh, kok kok, such irregular sounds seemed similar to the sounds that would be made when changing water pipes.

“…I don’t know.”

The sonar operator opened his closed eyes and took off the headphones from his ears. The two duty crewmen beside him looked over at the sonar panel to check that all the functions were working properly, and then put their headphones back onto the console hook. The dim lighting of the sonar room showed the wry faces of shrugs, and Adi, who sat on the duty officer chair, felt a sense of despair.

The 42-year-old sonar operator was relatively experienced even amongst the highly experienced NCOs. When Adi was still a toddler learning how to walk, the sonar operator had already got onto the submarine. In terms of reading sonar, there was no doubt that the sonar operator was Adi’s senior, but he lacked sensibility. The sonar operator was used to not using his imagination, and kept following the conclusion made by the sonar receiver. However, no matter how advanced technology was, a submarine crew member required instinctive intuition and the ingenuity of a craftsman.

“This is the sound detected by the passive sonar 30 minutes ago. It really did not feel like the wavelength of a jet engine, and the sound does seem to flicker from time to time.

Of course, it was impossible for a rookie sonar operator who just got assigned her half a year ago to criticize him face to face. Adi put the sampling number of the audio recordinto the analyzing monitor, and cautiously said,

“However, there is a regular rhythm in the sound we received. This really doesn’t sound like an underground volcano activity. Some submarines amongst the old nuclear submarines would let out such sounds. If we can compare it with HQ’s database…”

The analyzing monitor showed uneven waveforms. Despite the ship database showing a lack of match, there was no guarantee that this was not a sound from the propulsion system of a submarine. At this point, the screw propellers would only be used when navigating on the water surface, and when submerged, the fusion water jet engine that produced less noise would be used. However, a noiseless propeller system technology had already been the subject of research ever since the old centuries, when USA and the Soviet Union were in the midst of their cold war. The sound displayed on the curve was similar in some extents the early silent propulsion system.

Adi probably would have viewed this as a noise created by natural phenomenon if he had not found past records in the library of the submarine school. He continued to increase the intensity level of the sound analyzing monitor, but the sonar operator gave him a sighing voice, “I say, Adi…”

“It’s a good thing to be passionate about your research, and I admit that your ears are very sensitive. However, this isn’t a group activity a student’s doing here. Is it possible for a nuclear submarine in the old times to appear here? It’s true that some certain old century submarines are still in service, but their facilities are already upgraded. Do you feel that anyone will still use those antiques that are shelved outside the ship’s database.”

The sonar operator stood up, got behind the duty crew member, and put his hand on his fat waist. He, who had maintained a nice slim figure when he was young, finally succumbed to the biggest enemy of a submarine crew member, a lack of exercise. What was worse was that the food provided in submarines were the best in the army.

“Listen up, we’re looking for a spaceship here, a spaceship of those Zeon remnants who pulled off this one heck of an acrobatic and fell into the Atlantic Ocean. They definitely injected water inside the ship and submerged underwater. It’s impossible for that ship to make the noise of a water jet engine, and it’s definitely more impossible to make the sound an ancient nuclear engine. You’ll just hear the sound of the ship hull being compressed because of this unexpected submersion, and that should be what you’re looking for. The navy isn’t giving you expensive equipment just to satisfy your own interests.

The words that pressed down on Adi’s head caused him to feel that it was no different from the water pressure pressing down on the ship body. He lowered his dejected face, “Yes” and put on the headphones again. The sonar operator snorted, pulled his stomach in and passed behind the duty crew member to leave the sonar room that could be said to be as cramped as a can of sardines.

The curtain rail that was used as a separation was pulled aside, and the air came flowing into the sonar room from the neighboring command room. Unlike the cramped sonar room, the command room that was 10m wide would often have 10 important crew members ranked below the captain working there. To the Earth Federation Submarine EFS “Bonefish”, this block was basically functioning as a brain. The sonar room that was connected directly to it had to use the sonar sensors equipped inside the ship to act as the ears as far as possible, and report the situation around the ship to the central command. All duties were handled mechanically in rhythm in this 200m long Juneau-class submarine, and this was one of the organs supporting it.

At this point, the submarine was 300m in depth. It was moving at 10 knots per hour as it moved between the African continent and the South American continent. The Atlantic Ocean below the equator continued to search below the wide ocean space approximately 50m below. This belt of mountains underwater in the middle of the Atlantic Ocean was called the Romansh fault zone. As the young crust formed here had some magnetic minerals, it was very difficult for the sonar sensor to detect. If the Neo Zeon spaceship wanted to hide, this would be the most suitable space. The precipitous reefs around the fault were also in the way of the search, but it was imaginable that the enemy would not submerge too deep. Even if they have similar air capacity, the pressure resistance specifications of a spaceship would still be far inferior to a submarine. If they wanted to sink deeper, they would be crushed by the water pressure before their allied forces came to save them.

No, basically, it was worth doubting whether there were forces on Earth that could be considered their ally. It had been three days since they started the search, and the underwater search monitor only showed signs of reefs, and the source of this sound that was detected was the allied ship that was carrying out the search at the same time. The mood in this submarine that was under the normal marine department felt as relaxing as naval training, and the crew all forgot about the tension they had when they started launching. Adi felt that he was quickly losing interest in the source of this unknown sound as he sighed. Beside him, Corporal Genon heard him out and said, “Don’t think too much about it.”

“The sonar operator is an athletic type who became famous for football, so he can’t get along with an academic-based man like you.”

Genon took down the headphones on his ears as he smiled, “But I do feel that it’s not an ancient nuclear submarine as well. There’s no response on the sound screen anyway, so I think you probably heard the sigh of a “Sea Ghost”.”

“A sea ghost?”

“it’s just a rumor. About half a month ago, the SOSUS detected an unknown sound at the Atlantic control branch. At that time, they were wondering if there was a system malfunction…”

The so-called SOSUS was a defense system spread throughout all oceans in the world by using the sonar receptor embedded at the seabed. This system was particularly concentrated at the ports of several constituent countries, and it was not a laughable affair when the SOSUS of the Atlantic near the Federation government capital, Dakar malfunctioned. “Why isn’t this news get reported?” Adi pointed out.

“Because the system is just titular decorations after the Zeon remnants navy got dispersed. They’re scared that the budget will be cut if they reported this malfunction.”

“Is that so…”

“It seemed that the people from my dad’s time even had a fierce fight with Zeon’s “Mad Anglers”, but currently, it’s impossible for the diving fleet to meet actual battle anyway. Even our “Bonefish” is an old granny of 17 ship years. The navy would have been toast together with the army if not for the consideration of unemployment. In this age, the reason why everyone can live is all because of the space forces.”

“Then why did you join the army?”

“To obey my parents. If the son isn’t serving in the army, the retired officer living off pension will be sent to space. At their age, I don’t want to send them to live in the colony. Aren’t you the same?”

As Genon glanced over at him, “I…” Abi could only mumble as he turned to look at the sonar board. Adi’s father was a NCO in the navy, and without that relationship, there was no way he could have entered the army. Deep inside his heart, he did think that he could continue to remain on Earth as long as he stayed in the navy, but he did not choose to join the navy simply because of self-preservation. He simply loved ships, not the ships flying around in space, but a real ship that moved on the sea.

Due to his father’s occupation, he was often near a base in his youth. Perhaps it was because of this that he loved the sea ever since he was young. Adi always respected his father, who was awarded a shiny dolphin mark that was hung in front of his chest, and the bedtime stories that were told when he was young left him longing for the sea. The singing of the whales that could be detected from the sonar, the beauty of the sea surface at sunset, the mobile suits of Zeon that looked like Krakens, and the suffocating intense battles against enemy submarines—especially at the end of the One Year War, where the great naval battle near the coast of Jaburo, the old headquarters of the Federation army, took place. Adi kept begging his father to keep talking about that story, and he did not know how many times he heard it.

When he was young, Adi hoped to enter the navy when he was young and board a submarine. Despite him becoming distant from his father in his youth like ordinary people, he never lost sight of this aim. He successfully entered naval cadet academy, got more points than what was required to graduate through extra-curriculum studying, and was given the right to be assigned to the “Bonefish”, considered the newest submarine even as the naval fleet’s equipment were stagnated. It was of the same class of submarine as the one Adi’s father rode on in the War, both Juneau class ship—and Adi definitely understood its structure and capabilities as well as the captain. He enthusiastically embarked on his first voyage, but the seas after the war was different from what his father said. It was not a place of adventure.

After two Neo Zeon wars, the Zeon remnants left on Earth were basically swept, and the ones were merely some sporadic terrorist attacks from guerilla forces. Earth did not experience a real large scale war for 5 years. Despite the Neo Zeon forces that were degorotarily called “Sleeves”, the uprisings normally happened in space, and it was completely unrelated to the navy, especially the diving fleet that would only remain underwater.

“I heard that the battle before caused the relic of “Laplace” to be wrecked.”

Genon changed the topic. Adi remembered seeing the debris of that official residence in low orbit through the window when he went on a space camp in primary school. He added on, “Looks that way.”

“They said that the Neo Zeon ship crashed into Earth together with the relic there…those aliens were really persistent.”

Genon gave a wry look as he put the headphone back on to end this idle chat time. That’s right, those aliens have come to our territory. Adi thought about that again as he held onto the headphone tightly. The space forces did not know about the seas, so if a commotion in space is dragged to the sea, we’re the only ones who can respond. Adi mused in his head as he looked back to inspect on the various functions on the console.

He inspected the underwater search monitor that could recreate the situation at the seabed through CG and the sound screen that showed the shape of the target through the active sonar reflected off the bottom of the sea. The main sonars that were installed on the bow and the sides, separated equally, could block off all excessive sounds and concentrate the detected sounds inside the head phones. The excessive sounds here would refer to the machine sounds from the “Bonefish” itself and the fusion water jet engines installed on both sides letting out sounds of sea water being stirred.

The air pressure from Earth to space would actually go from one to zero, but in water, the water pressure would increase according to the depth. Considering that the place was not suited for humans to live in, a seabed of 300m was an isolated zone like space. Even if the enemy spaceship sank into the bottom of the ocean, it was not easy to save it. However, there was a chance that the Zeon remnants had a submarine for rescue. Adi closed his eyes, put his elbow on the console and paid whole attention to listen out the sound. He pricked his ears upon hearing the water flow that sounded like it was shaking an old pipe, and wanted to identify the enemy presence that was submerged underwater.

The area around the submarine was darkness, where light could not return. If there were windows, it was possible that they would be seeing darkness that was darker than space. Above this place was the ocean surface, sky and space where there were tens of billions living there. What kind of people do the people living in the colonies see us as? Adi gave a wry smile as he suddenly thought about him. He, who remained on Earth, stayed in a large metal tube that was moving at the bottom of the sea. It seemed that the people who moved to the space colonies called Earth as a gravity well, so people like him probably drew the short stick of the gravity well by staying over here—

Gonk! At this moment, the blunt sound of metal knocking into each other rang in Adi’s ears.

The hand that was pressed on the headphone immediately tightened up, and he looked over at Genon beside him. It seemed that the other man heard the same sound too. Adi turned his pale face, worked on the console, pulled out the problematic sounds, corrected them, and stared at the round screen of the sonar radar. Soon, the screen showed an orange light, and a sound beeping alarm rang as it entered Adi’s ears.

There were no matches. It was impossible to detect the propeller noises, but something was approaching gradually from the starboard. The distance was less than 1,000 meters, and an unknown metallic sound continued to ring. Adi only called about taking up the wireless communicator microphone in the ship as he yelled, “COMMAND, THIS IS THE SONAR!”

“Sonar detected, position 132. Target speed estimated at 30 knots.”

The metallic sound that had a mysterious rhythm to it did not stop. As Adi and Genon were carrying out their own identifications, the voices of the captain and the sonar operator rang inside the sonar room. The captain looked skinnier as compared to the sonar operator, and he looked less lively as before due to a recent gastric ulcer surgery. However, to a marine, the captain was still a respected figure, “What do you think that is?” Adi saw the captain lower his head to stare at him, and tensed up as he answered,

“I don’t know. This sounds different from a torpedo tube being opened, but it still does sound metallic. I’m guessing that it’s a machine running…most likely, the sound of an actuator running.”

Adi finished, and he himself felt that this was the case. This deep ringing sound that persisted on did seem similar to a crane or a similarly large machine. The sonar operator said, “This guy’s a rookie, but his ears are sharp.” The captain put the standby headphones over his ears and put his mouth to the nearby wireless communicator microphone. “Command, this is the captain speaking. Get the torpedo crew to position. Head east and prepare room for vessel operations. Increase speed by 10.”

Ting, ding. The speed indicator rang, and as the submarine sped up as it changed its course, the inertia that was caused started to act on the bodies. The sonar operator put his hands on Adi’s to support himself, and it seemed that he was praising the rookie for responding quickly. The competing sense of delight and tension rose in him as he looked tense while operating on the console, “Target’s increasing in speed!” but was shocked by Genon’s called.

“Distance at 800. Coming right at us!”

The flickering on the radar was quickly approaching the circle. It went passed 40 knots, the fastest speed a Juneau-class could move in water. The captain with an obvious black-ethnic blood immediately turned pale and commanded to the wireless communicator. “Command, increase speed by 10 again. Go full throttle.” At the same time, the sonar operator yelled “Hit the piner!” and Adi immediately pressed the active sonar on the console.

KONG!A shrill sound spread through the speakers, rocking the ship body of the “Bonefish”. The reflected waves bounced through the machine 4 times faster than it was in air, and the target silhouette appeared on the sound screen. One could feel that everyone present gasped.

As both sides were basically maintaining the same height, the shape of that thing was definitely how it looked from the front. However, the target’s silhouette was extremely abnormal. It was shaped like a flat rhombus, its longest length was 80m long, and its height was more than 30m tall. Looking at its shape, it was most definitely not a submarine, or rather, it was far from an ideal submarine. Also, the target was changing shapes from time to time as it approached the submarine underwater at a high speed.

“Is that the sea ghost…?”

The captain mused. The object continued to approach with its propeller system still silent, charging right at the starboard of the “Bonefish” that turned back. It doesn’t have a fusion water jet engine, so why it is able to move so freely in the sea? Adi’s mind went blank as the sonar operator pushed him aside to work on the sonar board. “60! It’ll crash into us directly!” he warned. “Emergency evasion…” the captain ordered in the wireless communicator, “Too late!” but Genon yelled louder as the sudden feeling of death that came caused Adi’s body to stiffen.

I’ll die in such a place. I haven’t done anything yet. I’m not as active as dad, and I never experienced such adventures. The sunsets, whale songs, everything, I haven’t experienced—

“IMPACT!”

The captain’s voice that sounded like a scream rang in the ears. Then, the sound of metal being ripped echoed through the ship, and Adi was thrown off the ship.

Genon too was knocked aside, and the captain and sonar operator had their backs crashed into the wall. The alarm rang, the lights were flickering, and Adi heard the sound of the ship being crushed. A large amount of seawater was rushing in through the ripped shape, and the hull where up and down could not be identified continued to sink. The sea ghost that bared its sea monster-like fangs gnawed the entire submarine to shreds—and Adi’s consciousness faded as he swallowed the fear his father never experienced.