by Dietmar Wehr
“But that would mean only partial coverage for the first 8 hours, correct?”
“Affirmative.”
“No good. I want complete coverage from the get go.” The XO pondered that requirement.
“Okay. Here’s how we do it then. We launch three drones now, then retrieve and recharge one every four hours when we’ve replaced it with a fresh one. “
“Okay. That works for me. Implement that right away and maintain until further notice. “
“Aye aye, Sir. Anything else, Sir?”
“No that’s it. End message.” Shiloh felt better for having taken that action even as he wondered how he would justify it in his log. Somehow he didn’t think the senior brass back at HQ would think much of his admission to having a ‘vision’. Senior Officers tend to get nervous when the Commander of a 20,000 ton Frigate starts ‘seeing things’. Shiloh decided not to mention his vision in his log. After finishing lunch he went back to his cabin and sat down to go over the daily reports and other administrative tasks that a Commanding Officer regularly needs to attend to during his free time between duty shifts. Halfway through the pile of paperwork, the Bridge called.
“Bridge to Shiloh.”
“Shiloh here.”
“Skipper, we just received the video feed from the drone’s second pass. The level of detail is much higher. Maybe I’m just being paranoid but the hull damage looks like the kind you would expect from laser fire. Torres hasn’t expressed an opinion but if you ask me, it’s obvious as hell.” Shiloh felt a shiver go down his spine.
“Based on what I saw from the first flyby, that doesn’t surprise me.” Shiloh pondered the situation for a few seconds. “Okay…I’m coming to the Bridge. End message.”
When he got to the Bridge, the XO started to get up from the Command Station but Shiloh waived her back down.
“Just pretend I’m not here.” He told her. Johansen just snorted in reply. Shiloh went to the Com Station and asked the Com Tech to replay the drone’s second flyby video. The XO hadn’t exaggerated. The video feed clearly showed a deep, straight gash with blistering around the edges. Laser fire was the only possible explanation.
“Com. Is a message drone being updated with the data from the Squadron?”
“Affirmative Sir.”
“Intercom… Shipwide…Attention all hands this is the CO. I’ve just seen evidence from the 301’s recon drone flyby that our sister ship, the 319 was attacked by unknown forces. The 301 will be sending over a boarding party to search for survivors. As soon as I hear what they find, I’ll pass it along. In the meantime, we have to be vigilant for whoever did this. If we need to go to General Quarters, you have to be ready to act instantly. If you hear the GQ alarm it’ll be the real thing. I’m suspending drills for the duration of this mission. That is all for now. End message.” Shiloh was just about to walk away from the Com Station when the Com Tech turned to him and said.
“Skipper, there’s a message for you from Cmdr Torres.” With the 9 minute time lag, it was going to be a one way message.
“Okay. Replay it from the beginning, Chen.”
“Aye aye, Sir. Switching now.” One of the screens at the Com Station suddenly showed the face of Commander Juanita Torres.
“Shiloh, you’ve probably seen by now the evidence that 319 was attacked. The chances of finding survivors seem slim based on the exterior damage that we can see from here. 323 and 299 will be rendezvousing with us soon. I have this nagging suspicion that 319’s being used as bait. If that’s correct then we may also be attacked at any moment. If you haven’t already done so, I want you to launch a message drone with all of the data collected so far. If my hunch is correct and we are attacked, you are ordered to immediately, repeat immediately jump back to our staging point and make sure the Base knows what happened. Do NOT under any circumstances come to our aide. I’m instructing the remainder of the Squadron to come together and join us asap. It’s my intention to leave this system as soon as we’ve finished recovering survivors, if any, and downloaded 319’s datalogs. Your primary mission is to get word back to Base. If you’re attacked, you have permission to jump out of here as quickly as you can. Good luck to us all. Torres out.” Shiloh didn’t hesitate.
“Com. Launch the message drone now and acknowledge the SL’s message.” The response was immediate.
“Message drone launched, Sir…Squadron Leader’s message has been acknowledged.”
“Understood.” He walked over to the Command Station and met the XO’s gaze.
“You heard?” She nodded. She was just about to say something when they heard the phrase that Shiloh had been dreading.
“Sensor contact bearing 089 by 022!” Johansen switched one of her Command Station screens to the same display as the sensor tech was watching.
“Can you determine distance, course and speed?” asked the XO
“Not yet, Sir. Only one of our recon drones has detected a faint reflection of sunlight off of a metallic surface and we’d need at least two drones to triangulate an approximate distance, course and speed. The other two drones are scanning the general direction of the reflection. We may have a better fix momentarily, Sir.” Johansen looked at her Boss.
“Skipper, I recommend we go to General Quarters.” She said quietly. He didn’t hesitate before nodding. After the XO sent the ship to General Quarters, Shiloh said.
“XO, I’ll take the Con.” As she turned to get up she said for the benefit of the Bridge crew.
“Skipper has the Con!” When Shiloh sat down in the Command Chair, he took the precaution to strap himself in, just in case the ship had to maneuver more violently than the inertial compensators could handle. He took a good look at the screen displaying the sensor contact. It showed the three recon drones, one in the center and the other two in the upper and lower right corners, with a green triangle representing the 344 equally distant from all three drones and a red flashing line extending from one drone to the upper left side of the screen. The alien vessel was somewhere along that line. If one of the other two drones could also detect a reflection, the screen would show a second line from the other drone and the intersection of the two lines would indicate the position of the alien vessel. Without that approximate position, there was nothing that 344 could do. The screen also showed the message drone gradually moving away from the ship on a course that could potentially take it dangerously close to the alien vessel, depending on where that ship might be. If the alien detected the message drone and tracked its course backwards, it would have a pretty good idea that another ship was lurking in the vicinity. While he was waiting for a second drone to get a fix on the alien, Shiloh realized that he should inform Squadron Leader Torres of their situation.
“Com, I’m recording a message for SL Torres, and the Squadron. Transmit it as soon as I’m done.”
“Aye aye, Sir.”
“Commander Torres, we have detected an unknown and presumably hostile vessel. The bogey’s range, course and speed have not yet been determined. I don’t believe that we’ve been spotted yet. It’s my intention to attack the bogey as soon as we have a better fix on its position. A message drone has been launched but may be detected, which is why I’m going to distract the bogey with our own attack. 344 may have to maneuver without warning. I recommend that the rest of the Squadron establish a new com link with you using your recon drone near the 319 as a temporary relay. If my attack is successful, I will follow your previous instructions and head back to our staging point without further delay. End message.”
There was still no second sighting. Shiloh wished he could attack now with the 344’s lasers but the faintness of the reflection was too imprecise to have much of a chance of a direct hit. A near miss would only alert the enemy vessel to 344’s presence. He had to have at least two sensor sightings to have any realistic chance for a laser hit. Three sightings would improve the odds even more. The fact that neither the 344 nor the other two drones had seen any reflection, suggested that the alien vessel
’s hull was at an angle relative to the sun such that no reflections were being bounced in the general direction of the other drones or the frigate. That implied that the alien wasn’t maneuvering and therefore hadn’t detected them. If it detected something, it might change its course and/or speed and perhaps even its orientation relative to the sun. Shiloh suddenly had an idea. He decided to take over direct control of the recon drone that was farthest from the bogey. He ordered its onboard AI pilot to broadcast an omni-directional signal lasting a fraction of a second, hoping it would be just enough to get the alien’s attention and therefore begin maneuvering. The ploy worked. No sooner had the drone transmitted the signal than the bogey began to maneuver AND rotate its hull orientation. Its hull’s irregular surfaces caused sunlight to be reflected in new directions and both the frigate and one of the other drones caught the reflection. Sensor data was quickly analyzed by the tactical AI. Range to the bogey was now determined to be 144,000 klicks away, speed was only about 13 kps but it was now accelerating at a very respectable 1.1 kilometers per second squared in the direction of the signal from the drone. Shiloh glanced at the screen showing the Tactical Officer’s primary display. The Tactical AI was projecting a laser hit probability of 61.8% but as more sensor data came in, the hit probability was getting better. At the rate it was changing, it would reach 90% in a few seconds. Shiloh had an idea. He asked the Tac AI to plot possible intercept courses for the recon drones versus the bogey. Only two of the drones were close enough AND fast enough to intercept the alien ship if it maintained its present course, and acceleration. One of the two drones was the one that sent the signal. Shiloh ordered all three drones to attempt to intercept and ram the alien ship. Even though the third drone would not be able to ‘catch up’ to the alien ship if it continued to accelerate, there was always the chance that the alien vessel might reduce its acceleration enough for the third drone to ram it. Shiloh looked at the hit probability display. It was approaching 90% but the rate of increase was slowing as the law of diminishing marginal returns kicked in. Theoretically it would eventually hit 100% if enough sensor data was accumulated or the target got close enough but at this distance, the best that Shiloh could hope for in a reasonable length of time was in the low 90’s. 344 had two standard laser turrets designed primarily for use against unarmored pirate and smuggler vessels. If that alien ship had any kind of hull armor, his lasers might need multiple hits to penetrate it. Another good reason to try to ram the bastard if possible. Even hull armor would have difficulty in mitigating the damage caused by the kinetic energy from a collision at the kind of speeds that both the bogey and the drones would be traveling at. The effect would be similar to what happened when tanks fired armor-piercing, kinetic energy shells at other tanks. The kinetic energy at the point of impact was so great that the impacting metal rod instantly turned to a jet of super hot gases that punched through even the densest armor like a hot knife through butter. If 344’s lasers didn’t cripple that ship, then Shiloh hoped the ramming drones would. Without turning his head, Shiloh called to his Weapons Officer.
“Weapons!”
“Sir?” replied the officer with a tense voice.
“When I give you the word to open fire, I want you to keep firing until I order you to stop or until the target is destroyed. “
“Understood, Sir!” Shiloh monitored both the hit probability screen and the Tactical display screen. The bogey’s vector was up to 55 kps and still climbing. The range hadn’t dropped that much but as the speed increased, the range would start dropping faster and faster. At least the message drone seemed to be undetected. Its speed was increasing fast too. Another two and a half minutes and the message drone would reach the optimum speed for a least time jump to the star system where the support ships were waiting for the squadron to return. Shiloh wanted to wait as long as possible so that the hit probability would be as high as possible but on the other hand, the longer he waited the greater the chance that the message drone would be detected. The 344 could make a microjump right now and get away from that alien ship but they would then need to spend time accelerating fast enough to reach their departure system quickly. The message drone could get back faster and was therefore worth protecting. Since it was being constantly updated with data from the ship up to the point when it entered jumpspace, the support ships would know what was happening. The hit probability indicator hit 90%. With two lasers firing, the odds of both missing was one chance in a hundred. The chances of both hitting on the first shot was slightly better than 4 out of 5. Shiloh decided not to wait any longer.
“Helm, go to maximum acceleration now! Weapons…open fire!”
“Opening fire now, Sir!” Almost immediately he said.
“Two hits! We got two hits! Lasers recharging…ready to fire again in…five…four…three…” Shiloh watched the Tactical display. The bogey had changed course. Its heading was swinging towards his ship. 344 hadn’t been hit by return fire yet. Shiloh assumed that the bogey had fired and missed or else they couldn’t fire due to damage from 344’s initial shot. 344 fired again. Time for his ship to change course.
“Helm, pull up 90 degrees! Go vertical then commence evasive action!” The Helm’s response mingled with the Weapon’s officer’s reporting of two more hits. Still no hits from the enemy vessel. Shiloh didn’t think their luck would continue for much longer. He checked the status of the message drone. It was still accelerating and apparently undetected. He checked the range to the bogey again. Still dropping and rate of decline was growing. 344 was pulling a higher acceleration than the bogey but its initial velocity might as well have been zero for all the good it did them. The bogey had a lot more velocity to begin with so even though 344 was gaining speed at a faster rate, the bogey was still moving faster due to its initial head start. The only thing that was working in their favor was the fact that by going vertical relative to the system’s plane, 344 was beginning a whole new vector. The bogey was moving fast ‘horizontally’ but not ‘vertically’. At some point the 3 dimensional geometry would start to work in their favor and the range would start to widen again. A part of Shiloh’s mind took note of the fact that the bogey’s rate of acceleration was still 1.1 kps squared. 344 was piling on the velocity at almost twice that rate. One possible explanation for that discrepancy was if the hull had a lot of armor on it. The extra mass would degrade acceleration performance. It would also explain why the four hits achieved so far didn’t seem to have affected the alien vessel’s ability to maneuver. If that ship did have enough hull armor to reduce its maximum acceleration by half, then 344 was in big trouble.
Shiloh checked the relative positions and time to impact of the recon drones. The drone that would reach the target first was still a minute and a half away from contact. The good news was that by following the 344’s vertical course change, the bogey was no longer accelerating horizontally and that meant the drone #3 had a viable intercept solution. A flashing red indicator on one of his screens caught Shiloh’s attention. The Sensor Tech confirmed it.
“We’ve got active scanning! The bogey’s gone to active scanning!” That was both good and bad news for Shiloh’s ship. Active scanning meant that the bogey’s return fire was bound to get more accurate. The good news was that the active scanning itself gave away the bogey’s position even more precisely than tracking it by reflected sunlight. There was no way that 344’s two lasers would miss now and in fact, they would now be able to aim both lasers at exactly the same point, thereby doubling the energy trying to penetrate that hull at a specific spot. Shiloh had to try to keep his ship from getting hit as much as possible.
“Helm! Redline the engines and go to max evasion!” He dimly heard the Helm Officer acknowledge his orders. 344 started to maneuver so violently that its crew started to feel it. Shiloh was glad he was strapped in. Just then the ship took its first hit. The extreme maneuvering saved the ship from taking the full brunt of the enemy laser. Instead they got a glancing blow that cut through the ship’s minim
al armor as if it wasn’t there and knocked out one of the maneuvering engine assemblies. 344’s acceleration dropped by 8% and the severity of the evasive maneuvers declined slightly but that meant the chances of getting hit again had just increased.
“Two more hits!” Shouted the Weapons Officer, his voice beginning to get hoarse. “We did it! We got through their hull! Reading atmosphere venting! Ready to fire again in…three… two…one…Firing! Two more hits! More hull penetration!” The Tactical display showed the bogey’s acceleration dropping for the first time by almost 0.2 kps squared. Shiloh also noticed that 344 seemed to be firing more frequently than the alien ship. If their weapon was far more powerful, then it would take a lot more energy to recharge it after every shot. So it was a race to see if the strategy of multiple shots with less power could damage the alien vessel severely enough before their more powerful but less frequent return fire crippled his ship. To his surprise, another full minute went by without another hit from the enemy vessel. During that time, 344’s lasers penetrated the alien hull three more times with obvious results in reduced acceleration. Just as Shiloh started to hope that they might get through this with only minor damage, 344 took a direct hit. Both laser turrets were knocked out as the beam slashed along the ship’s spine. Multiple compartments experienced explosive decompression with instant death for the occupants. Collateral damage included the severing of key control linkages between the Bridge and the rear half of the ship which meant they could no longer maneuver the ship from the Bridge. 344 continued to accelerate but now only in a straight line which meant that the next enemy shot would hit her again for sure. Shiloh’s Command Station screens lit up like a Christmas tree with multiple red and yellow damage lights. He heard his Helm Officer call out.