Also, the 1890s are a time of very rapid military buildup. The experienced workforce is in place, the infrastructure has been built up to massive scale, and Haven's expansion has now absorbed Trevor's Star and is threatening systems near Manticore proper.
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Culverin-class Destroyer
Mass: 104000 tons
Dimensions: 404 x 48 x 27 m
Acceleration: 547.4 g
80% Accel: 437.9 g
Broadside: 5 missile tubes, 4 lasers, 5 countermissile tubes, 4 point defense mounts
Chase: 2 missile tubes, 1 laser, 2 countermissile tubes, 2 point defense mounts
Number Built: 72
Service Life: 1899-present
The Culverin-class was designed as a powerful, general-purpose destroyer to replace both the Havoc and Chanson-classes. Although a bold design in terms of intent, the first units to be delivered came in over budget, and "overweight." Changes in requirements during the design process resulted in an increase in the offensive throw weight and a decrease in crew size, dictating the use of automation more commonly seen in merchant ships. In the end, the automation project was abandoned after the first two ships, but not before these changes delayed the commissioning of the first ship by two years and resulted in software and hardware glitches that were all but impossible to work out. The armament changes caused the Culverin to grow by nearly eight thousand tons and to lengthen by almost ten meters. Some point to these early problems as the reason that it took the Admiralty another ten years to try again to reduce crew requirements through automation.
When all was said and done however, the Culverin-class was nearly as good as its design simulations said it should be. It has significant electronic warfare assets, an impressive broadside for a destroyer, and solid defensive capabilities that mesh perfectly with the latest generation of Manticoran hardware. The primary complaint about the Culverin is its reputation as a maintenance headache, although part of this reputation resulted from periodic shortages of spare parts during the initial construction phase. The particular internal layout brought on by the design changes has caused a great deal of trouble for damage control teams, a fact that wasn't fully appreciated until the first units began to see combat.
Comments
This was brand-new as of the events of On Basilisk Station. Observe the problems that result from changing specifications in the middle of the design process. Also observe that the end result "destroyer" has darn near as much firepower, both offensive and defensive, as an Apollo-class cruiser twenty thousand tons heavier. Knowing the RMN's predilections, the reduced weight probably comes out of protection, energy armament, and long endurance; destroyers aren't usually designed to spend very long away from support bases or ports in RMN service as far as I can tell.
On the other hand, the Culverin is considerably lighter and less heavily armed than its contemporary CL design, the Valiant, which I'll cover in the next update since it's a post-1900 PD design.
Also, we see teething problems associated with increased automation of the ship. This has been discussed; the basic problem is that each crewman replaced by automation represents three things the ship does NOT have:
1) A pair of sentient eyes monitoring a system to spot failures and respond to them before something goes wrong. Hopefully, automation can be made smart enough to do this job. But any failure modes not specified in the software's parameters (say, unexpected problems caused by battle damage) can represent a problem that at least one human being has to deal with. And the fewer human beings there are, the harder it is to juggle all those problems, so the broader the software's remit and analytical capabilities have to be.
2) A mobile, flexible, self-aware "damage control remote" that can run around reacting to a crisis in one part of the ship that demands more resources to solve than would normally be present.
3) A similarly mobile, flexible person who can go around routinely replacing and maintaining systems so that no part of them is in danger of unexpected failures when a heavy burden is placed on it.
A lack of any of these things can be a problem in combat, even before the ship gets shot at.
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And now for one of the stars of our recent show...
Star Knight-class Heavy Cruiser
Mass: 305250 tons
Dimensions: 523 x 63 x 53 m
Acceleration: 509.3 g
80% Accel: 407.4 g
Broadside: 12 missile tubes, 6 lasers, 3 grasers, 8 countermissile tubes, 8 point defense mounts
Chase: 3 missile tubes, 1 laser, 5 countermissile tubes, 5 point defense mounts
Number Built: 74
Service Life: 1893-present
The Star Knight is in all ways a revolutionary design, not simply for the Manticoran Navy but for the heavy cruiser type in general. This class was the first two-deck heavy cruiser in the service of any navy, though a careful disinformation campaign kept that fact from becoming obvious until well into its service life. The fourth and final design built on the Prince Consort hull, the Star Knight was designed to replace both the Prince Consort and Crusader-classes. The design takes advantage of decades of research by the Weapons Development Board in system miniaturization and it represents arguably the most significant achievement of BuShips in the nineteenth century. Its significantly increased armament, more powerful sidewall generators, heavier armor, better electronic warfare capabilities, and more numerous point defense systems make it at least thirty percent tougher than the Prince Consorts
This improvement was due to the fact that the Star Knight was the first heavy cruiser designed from the keel out with the laser head threat in mind. The designers realized missile exchanges would begin to dominate, even among the lighter classes, and with half again as many missile tubes as a Prince Consort, the Star Knight could lay down an impressive volume of fire. While the number of beam mounts is equally impressive, the truth is that they are individually much lighter weapons than on some older classes, though the decisive edge in missile combat has blunted any criticism in that respect.
Despite this class' exemplary performance compared to its contemporaries, combat experience has shown that insufficient volume was allocated to offensive systems. This lack was largely due to one of the most controversial design choices: installation of a third fusion reactor as opposed to the normal two found on most ships of this size. Only a single reactor is required to carry the ship's combat load and the additional volume could have been used to mount a heavier broadside but, unable to find any way to mount ejectable GRAVMAK reactors and not entirely certain that their passive armor scheme could protect the core hull from laser head strikes, the designers opted for increased power system redundancy.
Despite the exponential increase in lethality over the Prince Consort, the RMN has come to consider the Star Knight a transitional design. Once wartime experience was factored in, the RMN began to develop an even more powerful and revolutionary heavy cruiser class as its replacement.
Comments:
"Two-deck" simply means that the ship's main weapon mounts are positioned on multiple "decks" that run parallel to the long axis of the ship; in other words, the ship devotes more of its volume to armament. This is supported by the weapons breakdown- a LOT more weapons. I'm surprised that they still think not enough capacity was devoted to weapons, though maybe the problem is limited magazine space- with the Star Knight dumping all its missiles and having nothing left to fight with.
One wonders how they measure the intangible that is ship "toughness;" if I were them I'd use simulations, but that begs the question of how reliable the simulators are at modeling RMN electronic warfare systems.
Also, they claim that the Star Knights have much lighter energy weapons- but neither Honor nor the actual test of events gave any sign that these weapons would have any trouble penetrating and destroying the defenses of a Havenite battlecruiser. Which suggests that the older weapons were if anything TOO heavy, if we accept as our premise that ships are designed mostly to fight opponents of roughly equal tonnage.
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And the star of our next show:
Reliant-class Battlecruiser
Mass: 877500 tons
Dimensions: 712 x 90 x 80 m
Acceleration: 488.7 g
80% Accel: 390.9 g
Broadside: 22 missile tubes, 8 lasers, 6 grasers, 2 energy torpedo launchers, 10 countermissile tubes, 10 point defense mounts
Chase: 4 missile tubes, 1 laser, 2 grasers, 6 countermissile tubes, 6 point defense mounts
Number Built: 95
Service Life: 1896-present
The Reliant is only five percent larger than a Homer but is a far more capable platform. While perhaps not as revolutionary for battlecruisers as the Star Knight was for a heavy cruiser, they are still extremely capable warships and ideally suited to the fast, slashing tactics that the Royal Manticoran Navy has embraced for over four T-centuries. They are the first units below the wall fitted with fully integrated modern armor materials. While these materials offered improved laser/graser absorption and far better secondary mechanical and thermal properties, they are difficult to nanoform, requiring specialized coded chemical catalyst gear and careful environmental control to emplace or replace.
Designed from the keel out as a squadron flagship, the Reliant-class has three boat bays with reserved visitor space for up to four additional pinnaces. Early in the First Havenite War, the few Reliants in service were most often found leading squadrons of older Homers and Redoubtables. As the wartime construction programs accelerated, they rapidly began to replace those earlier classes in frontline service.
Comments:
Actually surprisingly weak on antimissile defenses- the Reliants of this generation have only slightly better countermissile and point defense armament than a Star Knight of one third the tonnage. But by this time the RMN is fairly clueful about the laser head threat. And the Reliants have pretty darn good offensive missile armament (heavier than, say, a Sultan with its eighteen tubes). This suggests to me that the Reliants were in fact designed to operate alongside destroyer and cruiser screening forces that would supply additional antimissile capability to the combined fleet.
Note the remarks about the armor- again, details matter. This will be an issue in the next book, when a repair crew working on the Reliant-class battlecruiser Nike decides that they'd rather practically rip the guts out of the ship working from above/below (where there is no thick plate of this advanced armor material to cut through and replace) than try to get through that armor belt. In short, having thicker, harder skin makes the ship harder to do surgery on, and means that hospital stays are longer, so to speak.
One thing to bear in mind when doing weapons counts is that as a ship gets heavier, its tonnage increases with the cube of the length, but the surface area available to mount weapons on increases only with the square of the length: another version of the square-cube law. Thus, if you double all a ship's dimensions, its tonnage increases by a factor of eight, but it only has four times as much room to fit guns on. Interestingly, if we compare the Reliants to the hundred thousand ton Culverins, we do find that they have roughly four times as many weapon mounts...

The extra volume is still useful though. When the ship is twice as thick, that doesn't mean it can present more weapons to the enemy. But it does mean that the hull can be plated with twice as much armor, making it immune to weapons that would have gutted the smaller ship. And that the ship's weapons can be fed by bigger power plants, and magazines that store larger missiles, more numerous missiles, or both. And that internal spaces can have internal armor to protect them more thoroughly, in addition to the heavier surface armor. And that crew accomodations can be larger and more comfortable, allowing the ship to go on longer missions and keeping the crew in prime mental and physical condition. Et cetera...
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Now for a BIG step up in size- while we're on the subject of increasing tonnage by a factor of eight...
Majestic-class Dreadnought
Mass: 6750500 tons
Dimensions: 1278 x 185 x 173 m
Acceleration: 422.5 g
80% Accel: 338 g
Broadside: 28 missile tubes, 18 lasers, 24 grasers, 24 countermissile tubes, 24 point defense mounts
Chase: 8 missile tubes, 6 lasers, 4 grasers, 8 countermissile tubes, 8 point defense mounts
Number Built: 40
Service Life: 1896-1918
Following her father's death* and the subsequent forcible annexation of the Trevor's Star System (and terminus) by the People's Republic of haven, one of Queen Elizabeth's first actions was to reaffirm her commitment to her father's naval buildup, including a provision to more than double production of capital units within five years.
While the reasons behind the move to the Majestic-class were many, the argument that the RMN could build a substantially less costly dreadnought class than the Gladiators was one of the primary drivers, and the class was sold to Parliament as having a per-platform cost seven percent less than a Gladiator. There were other factors in play, however, including the fact that the Navy had to shift government contracts away from electronics providers that were under investigation for fraud and malfeasance.
Speeding up construction of a dreadnought (at least a dreadnought as capable as the Gladiator) proved to be a challenge, but the experience was to stand the RMN in very good stead in its ever-expanding wartime building programs. Ironically, though, while the Majestic had the virtue of being less expensive on a per-unit basis, the increased missile magazine size meant that the deployed cost of a fully equipped and armed Majestic was nearly equal to the "more expensive" Gladiator it supplanted.
For all of that, the Majestic was never an entirely satisfactory design. Slightly smaller than a Gladiator, its heavy missile broadside was only possible at the cost of close combat capability, and despite the increase in active defenses, it had a far more fragile hull than the Gladiator. This relative frailty, despite far more numerous missile tubes during a time when beam combat was falling out of favor, was one of the reasons the entire class was decommissioned before the older Gladiator.
*Technically a spoiler for House of Steel the story, but come on, you knew Roger III wasn't monarch when the mainline novels began...
Comments
Contra my earlier predictions, the Majestic does NOT mount four times as many weapons as the Reliant. Two to three times, at most. On the other hand, we've been explicitly told that superdreadnought weapons are individually much larger and more powerful than battlecruiser weapons, which may explain it.
Again we see the costs of trying to push the armament ratio on a ship too far in favor of weapons or defenses- a ship with too many missile tubes and magazines, and which pares down on expensive armor assembly (see the Reliant's issues for why that might cost) is going to become structurally weak and easy to destroy in combat. Combine that with the relatively large crew numbers per ton that the Majestics would demand, and it's easy to see why a demobilizing RMN would take them out of service and lay off or reassign the crews.
Note that this class is only about 15-20% lighter than the contemporary 'superdreadnought' classes: enough to matter, but not enough to make it comically lopsided if there's a fight between the two. In general, equal tonnages of dreadnoughts and superdreadnoughts might well be able to fight reasonably effectively against each other in the pre-SD(P) era. And the main reason not to build dreadnought-sized DN(P)s is that you'd either have to sacrifice volume for the internal missile core, or to sacrifice thickness of defensive armor around that missile core. Neither of which is a very palatable solution.
...
Finally, notice that while the light ships from this generation (the Star Knights, the Culverins, and even the older cruisers and destroyers) are still in service as of the 'present' of the series (the early 1920s PD), the capital ships are being retired (in this case, by Houseman) This is an indication of two things:
1) The demand for light ships in the RMN is underserved because of wartime construction demanding lots of capital ships. Thus, even older light ships remain in service despite huge changes in technology that have made those ships nearly obsolete. For many purposes that a light ship carries out, all that matters is that A ship be physically present, not that it be a super-duper headbuster of a ship that can beat anything in its weight class in the universe.
2) By contrast, capital ships are built specifically to fight large units of the enemy's best forces. And if they aren't up to that task, they immediately become obsolete. The older heavy ships have such high manpower and maintenance requirements that they simply do not offer enough return on investment to maintain in service compared to pod-capable combatants.
It's not just that they do not themselves dump pods (two pre-pod SDs could together throw nearly as many missiles as one SD(P)). It's that they lack the capability to fire the modern MDM missile, so basically the only contribution they could make in modern missile combat is to park in the middle of a formation and shoot down as many incoming MDMs as possible. This is not enough to justify keeping thousands of people sitting around on a seven million ton warship.
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Victory-class Superdreadnought
Mass: 7781250 tons
Dimensions: 1340 x 194 x 181 m
Acceleration: 409.6 g
80% Accel: 327.7 g
Broadside: 35 missile tubes, 20 lasers, 19 grasers, 6 energy torpedo launchers, 29 countermissile tubes, 27 point defense mounts
Chase: 9 missile tubes, 5 lasers, 5 grasers, 11 countermissile tubes, 9 point defense mounts
Number Built: 36
Service Life: 1892-1918
With the Victory-class, the RMN had finally hit its stride in superdreadnoughts. The construction woes plaguing the King William were a thing of the past, and the new design was a capable, missile-optimized platform that was a perfect match for the doctrine BuPlan had been perfecting since the advent of the laser head.
The class wasn't particularly large, as even at the time advances in capital ship design were progressing at breakneck speed. The entire series production run lasted no more than a handful of years before it was superseded by the Sphinx-class.
The disposal of the entire Victory-class in early 1918 PD by the Janacek Admiralty was one of the most contentious decisions made by Second Lord Houseman. Every single remaining hull was sold to Grayson at scrap prices, despite the fact that the GSN couldn't possibly provide the manpower for all of those ships out of its own resources.
Benjamin Mayhew's decision proved to be fortuitous, however, as the RMN scrabled to reactivate every hull it had in mothballs after the resumption of the war with Haven. While the newer ships had been brought back into service first, BuShips has been negotiating with the GSN for the return of over half the hulls over the next year. The remainder were crewed as GSN units with a higher than normal percentage of RMN "loaner" personnel.
Comments:
Go Steadholder Mayhew, buying up RMN ships at scrap prices and now selling them back!

More generally, I think Houseman may well have made the right choice by selling off these ships, see above; the one questionable call is that he might have been wise to hold out for a higher price. Although in that case the ships thus sold to powers other than Grayson might well have been irretrievably lost, this would still represent only a limited dent in the Alliance's combat strength given how old and obsolete any pre-pod SD is inevitably going to be.
Aaand some random things:
Please stop for a moment to visualize the ship: about four fifths of a mile long, over six hundred feet wide and almost exactly six hundred feet high. Or possibly reverse 'wide' and 'high,' I'm not sure. Anyway, these things are big beasts. Just wanted to say.
Also, notice the energy torpedoes. Clearly those are only useful at very close beam weapon range; it is a remark on the design priorities of the era that these are part of ship design. They sort of remind me of the ramming bows put on a lot of 19th century steam frigates and ironclads- many navies assumed that with the new technology allowing ships to move in any direction, and effective cannon ranges still being pretty short, there would be a mass return to ramming tactics found in ancient galley wars. To some extent that even actually happened- but it seems anachronistic in hindsight even if it was deadly serious at the time.
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Sphinx-class Superdreadnought
Mass: 8207000 tons
Dimensions: 1364 x 198 x 184 m
Acceleration: 403.9 g
80% Accel: 323.1 g
Broadside: 36 missile tubes, 21 lasers, 19 grasers, 6 energy torpedo launchers, 27 countermissile tubes, 31 point defense mounts
Chase: 8 missile tubes, 4 lasers, 5 grasers, 9 countermissile tubes, 11 point defense mounts
Number Built: 67
Service Life: 1895-present
The Sphinx-class was by far the largest SD class (in total hulls) when the war started. During the peak of the buildup these ships were entering service at an almost frantic pace of more than one every month.
In terms of weapons fit, the most visible feature of any warship, the Sphinx was merely an incremental update over the Victory-class, with no truly revolutionary ideas. That was scarcely surprising given the pace of production and improvements in design and construction. The first Sphinx was laid down before the first Victory was even commissioned, so there was little time for lessons learned from one to propagate to another.
While the weapons fit was largely the same as the preceding class, the defenses were much different. In theory, the RMN has always designed their capital ships to be able to survive their own fire; in practice, up until the war began, RMN simulation models were in an almost continual state of flux as the damage potential of the laser head warheads kept increasing, without actual real-world testing data to ground the sims.
The Sphinx-class marks the turning point where enough real-world data had been accumulated for BuShips to fully understand the kind of armoring and compartmentalization a ship of the wall needed to survive the new environment. Weapon mounts were rearranged, internal bulkheads were strengthened, magazines were hardened, and compartments were arranged to protect critical systems with less critical equipment spaces, all leading to a ship that was far more survivable than any design yet in service.
Still, the speed of design and development had not slowed, and, in a short construction run of only six years the RMN built almost twice as many Sphinxes as the previous Victory-class.
The Sphinx and follow-on Gryphon were the only classes spared in the Janacek build-down, though over half of both these classes had been placed in reserve by the time the war resumed. They have been reactivated on a crash priority basis on the theory that any ship of the wall is preferable to none, especially with the loss of so many incomplete modern units at Grendelsbane.
Comments:
Interestingly, the Sphinx is only slightly better armed than the Victory, and in some ways mounts slightly fewer weapons of certain types. As noted, most of the extra mass was allocated to bulking up the ship's passive defenses, so as to be fully survivable in a modern combat environment. I find it interesting that these ships are supposedly vastly more survivable than the Andurils, which are explicitly pitched as having so stupidly much armor that it actively gets in the way of doing any real work on the ship.
We can always chalk that up to improvements in layout. A ship whose fusion reactors are less likely to randomly explode, or whose ludicrous high-energy capacitors for firing beam weapons will "fail safe" instead of failing by shorting out and melting the power distribution grid, will be a lot more survivable even if it doesn't have big extra slabs of armor plate bolted on.
Note that "survivable" is here designed as being able to absorb hundreds of hits from X-ray laser pulses carrying energy on the close order of a few hundred kilotons- maybe as high as a megaton, but not much lower based on what I can remember.