X Miranda's vs an ISD
Posted: Wed Aug 27, 2008 11:48 pm
by Flectarn
Titles fairly self explanatory. The Dominion war shows the Miranda class as being the work horse of the fleet. How many of them would you need to effectively counter an ISD.
Posted: Thu Aug 28, 2008 1:37 am
by Cocytus
Fit one with the ablative armor generator, load it up with transphasic torpedoes and watch it tear through one ISD after another. Thread over.
I'm not sure really. Mirandas are pretty maneuverable (witness the ship darting back and forth to avoid Breen torpedoes in "What You Leave Behind") and should be able to avoid TL bolts at longer ranges. But those are about the only advantages they have. TNG showed us Mirandas relegated to courier and freight duty (the Lantree, the Brattain) The Dominion War necessitated putting everything on the front lines, even if it was expected to get shot up right quick, as the Mirandas were (the Majestic, the Sitak, an unnamed ship that suffered nacelle damage in the opening seconds of the SoA battle).
All that said, the number isn't as critical as an effective strategy that uses the inherent advantages ST ships enjoy over SW ships. Have the Mirandas use their superior sublight speed to stay ahead of the ISD and just wear it down with torpedoes from beyond its effective turbolaser range. Pretty soon the arrogant, bombastic Imperial captain will find that that the ships he no doubt considered "his first catch of the day" have not only eluded capture, but punched holes in his shields.
Posted: Thu Aug 28, 2008 2:13 am
by Jedi Master Spock
Definitely depends on what refit of Miranda we're talking about. Some seem to be nearly unarmed. Assuming we're talking about a war-fitted Dominion-war era ship with all the bells and whistles [quantum torpedoes, increased torpedo stores, fully modernized power systems, etc], a dozen should come close to matching it in gross firepower, and thus not far in ground attack ability.
I don't think they're that well refitted. Call it half that level of firepower for actual war-fitted Mirandas. However, a dozen is still (a) capable of strategic dispersal to cover a wider area, (b) better for ship-to-ship combat, (c) enough to render an inhabited world uninhabited, (d) more flexible, (e) have very nice long-range sensors.
"One at sufficient velocity" is also a viable answer for combat equivalence, but Starfleet captains generally don't engage in suicidal ramming attacks.
Re: X Miranda's vs an ISD
Posted: Thu Aug 28, 2008 4:02 am
by Mike DiCenso
Flectarn wrote:Titles fairly self explanatory. The Dominion war shows the Miranda class as being the work horse of the fleet. How many of them would you need to effectively counter an ISD.
You know, you could just as easily have asked how many
Nebulon-B frigates it would take to successfully engage an ISD in a straight up fight. It's about the same level of capital ship.
Assuming full refit upgrades, I would estimate about one to two-dozen Mirandas, depending on the circumstances and how good the commanders on both sides are. I'am also fully expecting that the ISD won't go down without having taken out a number of the Mirandas in this fight. Either outright destroying them, or leaving them severely damaged hulks.
-Mike
Posted: Thu Aug 28, 2008 5:44 am
by Who is like God arbour
That's ridiculous.
You are giving estimations without any traceable explanation, how you come to these.
Why would be one to two-dozen Mirandas necessary?
The only one, who gives an almost traceable explanation, is, if at all, Cocytus.
What do you know about the strength of weapons and shields, the targeted precision and the manoeuvrability of the Miranda class or of an ISD?
What do you know, which effect the weapons fire of a Miranda class star ship will have at the shields and hull of an ISD and what effect will have the weapons fire of an ISD at the shields and hull of a Miranda class star ship?
- There are Star Wars fans, who are believing, that Star Wars shields are so strong and Star Trek weapons are so weak, that thousand Miranda class star ships wouldn't be able to overcome the shields of an ISD.
And there are Star Trek fans, who are believing, that Star Wars turbo lasers, because they are called laser, are not able to penetrate even the navigation shield of a Star Trek vessel.
Other Star Trek fans are thinking, that a phaser wouldn't even interact with the EM based shields of an ISD while some Star Wars fans are thinking, that the weapons of Star Trek vessels are not strong enough to damage the hull, even if there is no protecting shield.
You have to compare those values and then conclude, how many Miranda class star ships would be necessary to destroy an ISD. It's OK, if you refer to other threads and sources and summarize them. But you have only given your conclusions. And such an approach is ridiculous.
Posted: Thu Aug 28, 2008 1:02 pm
by Jedi Master Spock
Who is like God arbour wrote:That's ridiculous.
You are giving estimations without any traceable explanation, how you come to these.
Why would be one to two-dozen Mirandas necessary?
The only one, who gives an almost traceable explanation, is, if at all, Cocytus.
What do you know about the strength of weapons and shields, the targeted precision and the manoeuvrability of the Miranda class or of an ISD?
What do you know, which effect the weapons fire of a Miranda class star ship will have at the shields and hull of an ISD and what effect will have the weapons fire of an ISD at the shields and hull of a Miranda class star ship?
- There are Star Wars fans, who are believing, that Star Wars shields are so strong and Star Trek weapons are so weak, that thousand Miranda class star ships wouldn't be able to overcome the shields of an ISD.
And there are Star Trek fans, who are believing, that Star Wars turbo lasers, because they are called laser, are not able to penetrate even the navigation shield of a Star Trek vessel.
Other Star Trek fans are thinking, that a phaser wouldn't even interact with the EM based shields of an ISD while some Star Wars fans are thinking, that the weapons of Star Trek vessels are not strong enough to damage the hull, even if there is no protecting shield.
You have to compare those values and then conclude, how many Miranda class star ships would be necessary to destroy an ISD. It's OK, if you refer to other threads and sources and summarize them. But you have only given your conclusions. And such an approach is ridiculous.
Ah, but to truly counter a ship, we need to consider not only the scenario of ship-to-ship combat.
I do think that one
Miranda can kill one Imperial Star Destroyer in open space. We could easily put both at a hundred megatons per second without too much trouble, and the Miranda has better range, mobility, sensors, etc.
I also acknowledge, however, that an Imperial Star Destroyer is likely to have longer combat endurance; the
Miranda may only carry a few minutes of torpedo supply in a TNG era refit (
Voyager only had a couple dozen; the E-A carried 96) making it better for a bombardment mission individually. The ISD is likely able to operate at full combat rate for much longer, and may also be more durable.
The ISD also can carry and transport a larger number of troops and supplies. Even if it does not have transporters, it still has a couple hundred times the cubage; if the ISD devoted 10% of its total volume to transport, that would be more than a GCS could carry.
A dozen Mirandas aren't likely to carry more than half the supply of ISDs, but replicators and transporters are force multipliers for logistic operations; the ability to use them independently also helps make up for their probable smaller capacity.
Posted: Thu Sep 04, 2008 4:14 am
by Mith
Well, let's look at this:
The ISD's firepower in the movies has shown to be somewhat lacking in terms of even NX means (not that an NX could beat an ISD. Lacking of shielding would do that). Of course, this firepower is at best around a megaton for their HTLs, as G2k has displayed with his Lucas Quote from Revenge of the Sith. According to wookipidia, an ISD has six heavy double barrel turbolasers, and two heavy quads. Since each beam from the battle was stated to be a megaton, that would basically mean about 20 megatons in a volley. We might even be as kind to say that their weapons could double in strength in that short time frame. This however, is illogical as no outside threat posed itself against the Empire, and as we saw, their ships became cheaper; focusing on the essentials rather than the latest design. This would make their ships solid, but last sophistication.
Unfortuantely, an ISD's weapons are all spread out, and thus this makes it nearly impossible to get all 20 megatons on something as small and as nimble as a Miranda class starship. The speeds of an Miranda is simply god-like compared to human reflexes, even as such with computer aid. No one can relistically expect anyone short of a Jedi to have any sort of luck hitting a Miranda, it just isn't possible.
Their medium lasers however, are more distributed, but lack any kind of punch; even presuming that the asteroid in ESB was 40 meters and vaporized, that's still less than 500 kilotons. Certainly a pain in large numbers with evasion...if it were a old style Constitution class, but to a Dominion War style Miranda? Hell no.
However, Spock is correct about the ISD's durability. These ships apparently are supposed to battel for lengthy times (never seen if I can recall. That SSD sure as hell didn't last too long under bombardment...). Not to mention the ISD's armor is probably pretty thick, but again, we've seen just how..."effective" Imperial armor is. He also has a point with the limited armament of a Miranda. Its purpose in the war was at best, supportive; forcing the enemy to waste firepower on them, giving an extra jab here and there, and escorting more important ships that might draw a great deal of firepower from the enemy. At best, I'm guessing 25-50 photon torpedoes. And said torpedoes are probably fairly low yield in comparison to more modern ones, but not likely too low. Even taking something as low as 25 megatons, that's still a torpedo armament of 625-1,250 megatons right there. Phaser wise, the Miranda has better coverage, and can fire with better angles as well.
The actual fight:
Assuming typical behavior in an agressive situatio. The Starfleet captain would probably start off with a phaser strike, as most captains seem to do. Likely to test for weaknesses in their shielding, as well as a minor jab.
The Imperial captain would probably underestimate something that small and it isn't unfair to think so in his position; most Imperial warships that are threats are F*ing large. He might see it as a heavily armed frigate. As such, he's likely to order for medium lasers to arm and attempt to disable the vessel. The ship will likely miss their initial attacks, but one or two hit. The enemy ship shows no sign of weakness, but does fire two more shots at other areas of the ISD. The Imperial captain figures that they either have no idea what they're doing, or they're looking for weak points in their shielding. He orders full power to the deflectors; he doesn't want anything to get through.
The Starfleet captain hasn't yet learned the weak points in their shielding, but the hits have shown him how and where the shielding is. Their medium weapons are fairly weak; only half a megaton. Still, he's had enough with pleasent exchanges and orders an aft torpedo to fire. The Miranda class fires, and hits the underbelly of the enemy warship. The torpedo is incredibly effective; according to his tactical officer they didn't just deal heavy damage to the enemy's shielding, but the bleed through managed to melt the outer layer of their hull.
The Imperial captain is shaken up by the immense firepower of the small ship, and quickly orders the HTLs to fire on it. Unfortunately, most of the shots miss horribly, but one makes the mark. Unfortuantely, the shot is shrugged off by the ship's large bubble shield. Thinking it best to force the enemy ship to engage in numerous targets, he sends out fighters and bombers, and then orders that help be summoned.
The Starfleet captain sees the ships, and isn't really all that worried. The Miranda's sensors show that their fighters can't toss out more than a hand photon grenade and the bombers are sub-kiliton. Still, he doesn't want to take any chances and orders the tactical officer to pick off the bombers and fighters with low-key shots from their phaser banks. He then orders another torpedo at the warship, this time targeting one of their big guns pushing out a megaton per shot.
The Imperial captain is glad to see that the enemy ship has forced to concentrate its strange energy weapons on the bombers and fighters, but he can see that they really aren't slowing down; a handful of bombers were destroyed upon impact when they hit the ship's forward shields. He is in luck however, as the ship lines itself perfectly for the HTLs on the ISD's right side to fire upon the ship. He watches on a nearby tactical screen as the output of the enemy ship's shields are slowly sliced away. He realizes too late that something was wrong; surely even with a tactical advantage no one would just run into enemy fire. He quickly orders for full speed to the ion engines, but the ship fires another red blob of light. He orders it shot down, but to his horror the shots just splatter against the blob. As it impacts with the HTLs, he feels the ship lurch a bit under the impact. Quickly he orders up a sensor report on the damage.
The Starfleet captain watches as the torpedo blows apart the entire array of large guns, leaving the right portion of the warship horribly undefended. According to his tactical officer, the bombers and fighters have been nearly eliminated. Deciding that they were no longer a threat, he orders forward phaser banks to fire upon the damaged area where the large gun array was. The phaser strikes strike shielding the first time, but on the second, they hit the damaged areas.
The Imperial captain watched as the red energy just seemed to eat up portions of the ISD. The torpedo had dealt a great deal of damage on its own, but the bleed-through damage had caused the HTLs to explode; robbing the area of its shielding and dealing significant damage to the hull. Now with those red energy weapons, they were loosing more of their hull. He snaps at the closest officer to get the fools who were aiming at the ship to start hitting something.
The Starfleet captain orders another strike, but this time using an aft torpedo to hit the other array of big guns. A few moments later, the last of the large guns are destroyed, and a few phaser strikes from the Miranda ensures that the ship is weakened in two different areas, making it harder for his enemy captain to defend against. His tactical officer reports that the enemy warship is using its medium guns to ensure more accurate hits with a slight decrease in power, but the shields are still holding at 78%.
The Imperial captain is cursing and has struk his first officer for his incompitance. Moving over to the tactical officer, he demands to know why the ship was able to penetrate their shielding yet again. The officer stutters that their shield generators just can't produce the protection needed after sufferinga hit in a sensitive area. The ship rocks again as another red blob hits the mid section of the ISD. The shields are able to hold, but bleed-through saw to it that part of the hull was melted. Uttering a curse, the captain orders that every space-capable ship be sent out to try and slow the ship down. That however, gives him a brilliant idea.
As the Miranda's phaser banks scored multiple hits on the enemy warship, the tactical officer was able to spot weak points in the enemy's shielding. The hits on the heavily armored portions were effective, but the warship's generators were quick in recovering. In the areas where their large gun arrays had been destroyed however, the internal damage coupled with the phaser strikes left them as open targets. Unfortunately, those targets were still too far away from any critical systems. As the Miranda made a turn to once again fire, the ship jerked. The tactical officer quickly informs him that the ship has locked a tractor beam onto them and all the weapons are now firing on them.
The Imperial captain beams with pride as all the guns with the angle fired upon the small ship, lighting up her bubble shield. All fighters, bombers, and transport craft were also firing their weapons. With each strike, the enemy shield was slowly weakened. Then the Imperial captain watched in awe and fear as the enemy's ship light up like a laser show. All of its arrays were firing. Most of them were at the tractor beam holding them in place, but those that couldn't fire at it were firing exteneded energy beams and using them to tear apart the swarms of small ships. The ship unleashed two red blobs from its launcher pod. The torpedoes impacted, but the shield held; a trick of simply overlapping shielding of three different generators.
The Starfleet captain bit his lip; he's underestimated the enemy. His tactical officer reported that the ship was overlaying three different shields in order to keep their torpedo from destroying the tractor beam emitter. The captain quickly ordered a torpedo strike on the exposed sections of the enemy warship, hoping to deal some damage back. The torpedoes hit and exploded, blowing large holes into the warship, but his tactical officer reported that the blast was mostly absorbed by the thick layered armor, and that only small portions two decks were destroyed from the hit. The captain sat back, thinking about all the great moves used by heros of the Federation. And then, it came to him. Not exactly Federation in origin, but good enough.
The Imperial captain laughed as the ship blasted holes into his glorious ISD. True, the damages would ensure that families on industrial planets might starve for a few days, but the plan was working perfectly. The ship's shield output was already stated by to be at 64%. Apparently, the ship wasn't designed to take a constant beating; using its agility and speed to give the shielding grid time to disperse the energy poured into it. Suddenly, the ship fired two more blobs at the emitter. He chuckled, but as he did, the ship fired two energy shots right into their own blobs. Before the cpatain could even pause to wonder why the hell they'd fire at their own energy weapons, the red blobs exploded. The shockwave from their explosion tore right through the layers of shielding and shattered anything within five meters of the tractor beam emitter. He watched as six decks were scrambled by the shockwaves, and then sucked out into space.
The Starfleet captain nodded, and the Miranda shot over the warship, her aft launchers firing at the large hole that her previous shots opened up. The topreodes dissapered into the hole and detonated, tearing up fifty meters worth of hull, and devistating a large portion of the ship's interior. Using the old Romulan trick to fire at one's own torpedoes was effective, but the shockwave had also drained his ship of its own shielding; reducing their output to 31%. He watched as the hulking warship fired another volley into the Miranda, but the shield grid managed to take it, although it lost another two percent in doing so. He ordered them to return the favor, and four phaser emitters racked the right hole where the gun arrays had stood. More of the hull was vaporized from the strikes, but the battle wasn't over yet. Already he was having reports of the warship trying to lock another tractor beam onto them.
The Imperial captain barked his orders again; he wanted that thing back into a tractor beam at any cost. Despite the heavy damage that his own ship had taken, the small ship's shields had suffered as well, and using that trick again would severally disable the ship. He watched as the ship's pod unleashed two more blobs, hitting some of the exposed portions of the ISD's hull. They tore up the hull and destroyed portions of the upper decks, but he wasn't worried; he'd soon have them.
The Starfleet captain cursed as another tractor beam locked onto them. He quickly ordered a full volley of torpedoes. Two photons struck the enemy shield, but they'd already divered portions of the ship's shielding to block the strikes. He ordered a follow up of phaser strikes all over the area, but the T.O. couldn't locate a weak point for them to exploit. Tapping the arm of his chair, he came up with an adjustement to his former plan.
The Imperial captain smiled as the ship fired two more blobs, but instead of impacting the emitter itself, they flew a few meters past before the ship fired its energy weapons. The explosion was powerful enough to strip away most of the shielding of the emitter, and with another two blobs, fired from the aft section of the ship, the emitter was obliterated. Turning to his T.O., he asked for shield damage, and nearly screamed when he learned that only 10% of the ship's shielding had been lost through the detonating trick.
The Starfleet captain sat back, sighing a large sigh of relief as the Miranda put some distance between it and the large warship. Even if it could manage to lock onto them from that range, they would be able to destroy it from range before the beam could pull them in. However, despite the damage areas of the warship, it was still more or less running enough to fight, and the Miranda had already expended most of their torpedoes, and only ten of them remained. The captain sighed and leaned back. The cost of bringing the behmoth down to half its fighting strength was costly and he wasn't sure if he could keep it up.
The Imperial captain ordered all engines at maximum power; he didn't want the ship to escape his grasp. The fighters harrassed the ship, but it just blasted them apart with short bursts and fired two more blobs at the large hole in the forward portion of the ISD where they'd first been halted. The blast from the two blobs blew a hole right out of the belly of the ISD. The T.O. warned him that the ship's structure wouldn't be able to keep up their speed with the amount of damage that the enemy had done to them. The ship however, was moving back in, firing its phasers at the areas where the HTLs were, and then firing a red blob into each of them. The ship rocked some more, and the T.O. began to panick. He turned and explained to the captain that the shielding generators around the bridge had suffered damage from the hits; in seconds their bridge would be without a shield.
The Starfleet captain sighed as the Miranda fired two more torpedoes from her aft launcher, hitting the gaping hole in the forward section of the warship. The torpedoes penetrated deep into the decompressing decks and exploded; causing the forward point of the ship to break off and float away. As it did; the exposed decks of the warship began to disintigrate under the speeds at which it was moving.
The Imperial captain felt like choking his helmsman for slowing down, but he had more important things to worry about; he quickly ordered nearby generators to focus its protection on the bridge and exposed areas of the turbolaser turrets. He was panicking now; the ship's forward hull had been blown off, and a large portion of the remaining decks had ben reduced to dust. Already reports from engineering were informing him that the ship would be unsuitable for hyperspace or manuvering speeds. The only good news was that the constant barrage of the ISD finally brought the enemy ship's shields down.
The Miranda class weaved in and out of the laser weapons as she fired two after torpedoes; tearing up an entire array of smaller turrets. More decks were opened to space, and the T.O. was picking up massive fluctuations in the ship's main power grid; they were suffering rolling blackouts throughout half of what remained of the warship. Only essential systems were being used. The Miranda shuddered as two shots scorched her hull. Another shot caused some minor melting in one of the support nylons, but otherwise the old ship was holding up. One of the last remaining big guns however; a turret consisting of four barrles fired upon the ship's disc section. The ship shuddered and it was reported that half the armor in the area had been melted away.
The Imperial captain glared at the ship; even with a hit from one of their remaining heavy turbo lasers wasn't enough to disable the exposed ship; just melt away portions of her armor. Still, with so many guns shooting at the target, they were managing to score in some hits that seemed to slowly, but surely wearing down the little ship. It quickly turned about however, and fired a series of energy beams hitting the lower portion of the bridge, followed up by two red blobs. The captain ordered all available shielding to overlap the bridge. The explosion was immense, but the shields held. He ordered a retaliation strike, but the small ship had passed by the bridge towards the back of the engines...
The starfleet captain had expended the last of his torpedoes, but it was worth it for the distraction. He gave the command, and the Miranda turned about and fired all of her phaser banks...right at their ion engines. The phaser hits caused large portions to vanish under the waves of red phaser energy. A moment later, his T.O. confirmed that the main reactor of the warship was going critical. The captain sat back and then ordered for warp power.
Posted: Thu Sep 04, 2008 11:50 am
by Praeothmin
Nice story Mith, but once again you do a "Warsie" and overestimate the power of the Feds and underestimate the power of an ISD.
As we've seen in DS9's war angle, Mirandas are only capable of sustaining 1 or 2 hits from the Cardassians' and Dominions' weapons before being disabled.
They're not that though, but they are maneuverable and do have Photorps.
I mean, look at the trouble an ISD had in hitting the Tantive 4, which was barely moving at a crawl in a straight line.
Approximately only 1 in 3 shots hit, the others going wide...
Imagine how little would have hit if the Tantive had been able to turn... er, maneuver... :)
Because of the resilience of an ISD, and because of the maneuverability and Photorp complement of a Miranda, I'd say that 6 Mirandas ought to do the job, with at least 4 of them destroyed or crippled and the two remaining heavily damaged, but the ISD would be destroyed.
Posted: Thu Sep 04, 2008 3:16 pm
by Mith
Praeothmin wrote:Nice story Mith, but once again you do a "Warsie" and overestimate the power of the Feds and underestimate the power of an ISD.
I didn't think I did. Remember, that for the most part, the Miranda was able to evade Imperial firepower, and the ship was in bigger trouble when she was trapped by their tractor beam (and would have been in much more if it wasn't for the fact that most of the HTLs had been destroyed). I don't think I overestimated the Miranda, although I will conceede I underestimated the ISD a bit, impart because I had the Miranda disable her weapons too easily, and deal too much damage to their shields with their torpedoes. I think I got their armor down fairly well and the structural damage was fairly light until the torpedoes were sent right into the holes in the starship (remeber that ST ships use forcefields to cover up their holes), which allowed for the blast to be almost contained; the explosions had less places to go.
As we've seen in DS9's war angle, Mirandas are only capable of sustaining 1 or 2 hits from the Cardassians' and Dominions' weapons before being disabled.
This is true, but the ships had also likely taking damage before that paticular shot. I doubt it was more than one or two though, as their shielding would probably be limited to a few hundred megatons, but chipping away with a couple of megatons per shot isn't going to do much.
They're not that though, but they are maneuverable and do have Photorps.
To defend my argument, the ISDs have shown only about a megaton for their large, sluggish guns.
Because of the resilience of an ISD, and because of the maneuverability and Photorp complement of a Miranda, I'd say that 6 Mirandas ought to do the job, with at least 4 of them destroyed or crippled and the two remaining heavily damaged, but the ISD would be destroyed.
Again, I agree that I underestimate the resiliance of an ISD a bit, but surely six Miranda's are not needed to take one ISD down. Remember, these things have inferior firepower to the NX.
Posted: Thu Sep 04, 2008 7:53 pm
by Mike DiCenso
Praeothmin wrote:I mean, look at the trouble an ISD had in hitting the Tantive 4, which was barely moving at a crawl in a straight line.
Approximately only 1 in 3 shots hit, the others going wide...
Imagine how little would have hit if the Tantive had been able to turn... er, maneuver... :)
I don't think the Tantive was going a mere "crawl", she was making good acceleration, but only at the price of not maneuvering to do evasive action against the ISD TLs. Probably Captain Antilles was hoping that he could outrun the ISD and make a hyperspace jump. Either that or they got caught nearly flat-footed when the ISD jumped in.
-Mike
Posted: Thu Sep 04, 2008 8:44 pm
by Mike DiCenso
Mith wrote:
Again, I agree that I underestimate the resiliance of an ISD a bit, but surely six Miranda's are not needed to take one ISD down. Remember, these things have inferior firepower to the NX.
Not really. An NX class starship only would rate around 1-10 TW per shot from her forward twin phase cannon batteries. Only the photonic torpedoes give an NX anything like megaton range firepower, and those torpedoes will be limited in numbers. The triton class spatial torpedoes and the plasma cannons the ships used early on don't even merit consideration their yeilds are so low.
ISD's on the other hand will be able to
fire single and possibly double-digit kiloton shots from the myrid numbers of their small and medium TL batteries, the combined firepower of which can probably hurt medium-small Trek ships like a Miranda in short order, if enough shots can be landed.
The heavy TLs on an ISD should be much more powerful than you are giving them credit for. RSA's calculations mostly apply to the the TLs of the Republic cruiser star destroyers (a.k.a Venators). An ISD also has quite a large number of heavy TL turrets as see
here in this detail photo of the
Avenger Type-II ISD model from TESB. There are eight gun barrels per large battery and four such batteries overall, or 32 barrels. That's 32 x 1.5 MT = 48 megatons per broadside. The light and medium TLs might be able to amass a collective firepower that is nearly comparable. The total forward or topside arc firepower for an ISD could collectively exceed 100 MT.
While TIE fighter and bomber firepower does not seem very impressive, a few gigawatts at best, the fighters can be used as a sufficent distraction, or proton torpedoes can be used to whittle a little bit away at the Miranda's shields.
-Mike
