Naval Strength and Losses (most current, pre turn 7)
Terran Hegemony: 834 Size Class in Service, 98 Size Class Lost. (924 Total)
Effective Yard Space: 87.5
Lost:
6 Black Lion
1 Dreadnought
1 Bonnaventure
2 Monsoon*
6 Quixote*
3 Aegis*
1 Dart*
7 Cruiser*
3 Lola*
1 Bonaventure*
3 Vigilant*
* - denotes self-inflicted losses
Unsurprisingly, given roughly 10x the budget of any neighbor, the THN has roughly 10x the fleet. It has lost more ships than the Federated Suns have built, most of them to internal conflict, and this has had and will have no impact on their fleet size.
Under current political and budgetary conditions, the THN can simultaneously declare war on all of its neighbors with a 2:1 force advantage, allowing it to not only conquer all of human space (in naval terms), but to do so at relatively light naval casualties. If nothing else, the THN probably has the resources to wipe out all space based infrastructure in human space, choke all commerce in human space, and demand abject surrender and offer whatever terms it wants.
Barring a massive change in internal priorities resulting in a 50-80% reduction in naval budgets, or a truely divisive civil war that is both incredibly destructive and serves to shatter the TH into multiple pieces, all action in human space exists as mice conducting their little wars in the shadow of colossus.
Federated Suns: 78 Size Class in service, 12 Size Class Lost (90 total)
Effective Yard Space: 9
Lost:
2 Albion
2 Galahad
A long history of conflict with limited losses at the expensive of its neighbors puts the FS in a solid position. Yard losses may or may not prove meaningful, depending on future hull losses. Early expansion to large yards has fueled a large total production schedule, in terms of mass.
Lyran Commonwealth: 69 Size Class in service, 14 Size Class Lost (83 total)
Effective Yard Space: 13
Lost:
3 Tyr
2 Heimdaller
1 Walkurie
Lots of peace with one very bad turn. Despite this, the second largest fleet in space by total size classes. Mix of designs - some unrefitted, some refitted, and some very modern and very powerful - makes it hard to guess how the fleet will perform going forward.
Free Worlds League: 66 Size Class in service, 15 Size Class Lost (81 total)
Effective Yard Space: 20
Lost:
4 Heracles
3 Phalanx
Lots of peace, some small wars. FWL focus on picking a design and mass producing it helps - makes it easier to absorb losses. Similarly large numbers of class 3 yards will make almost any losses trivial to replace - the Heracles is kinda the T-34 of space, and the FWL could build a dozen next turn if it chose. On the flip, the failure to build anything larger than a Class 3 hull hurts overall production tonnage efficiency.
Draconis Combine: 66 Size Class in Service, 20 Size Class Lost (86 total)
Effective Yard Space: 11
Lost:
4 Atago
3 Minikaze
2 Tate
Fleet may be less strong than 66 size in service reflects - lots of unrefitted, short production run, older designs. Modern wall is on the other hand VERY modern, and very polished. Budget advantage over both neighbors, with large yards, may put DC back on top overall if they are given breathing room.
Capellan Confederation: 54 Size Class in service, 18 Size Class Lost (72 total)
Effective Yard Space: 11
Lost:
6 Quinru Zhe
2 Quizuhan
1 Wifes Wrath
Small power, strong neighbors, lots of wars early. Coupled with a weak economy and bad starting yards, the CC has prospered from the last few decades of peace, to the point where they approach at least the FWL in combat strength, though not the FSN.
Marian Hegemony: 10 Size Class in service
Effective Yard Space:2
The Marian Hegemony can no more threaten the FWL than the FWL can threaten the TH. However, the periphery power is relatively better off than a great house - inasmuch as a great house crushing a periphery power would weaken itself, and it has dangerous peers. For all of that, the Hegemony Navy exists primarily in pursuit of local territorial objectives, given its splendid isolation from the inner sphere.
Taurian Concordat: ~20 Size Class in service
The TCN is hard to weigh. I have here treated 100KT stations as size class 1/2, and limited the count to battlestations and the like - even though I omit battlestations from other navies counts. By choosing stations and tugs over warships, the TCN gets greater weight of fire for its cost, but must accept certain drawbacks in tactical, operational, and strategic agility. It will likely serve them well on the defense, and poorly on the offense - but with only Federated Suns for neighbors, their posture is essentially defensive, anyway.
Rim World Republic ~18 Size Class in service
Effective Yard Space: 5
By far the largest and richest of the periphery realms, and with a navy to show for it, the RWR is strong enough that the LC cannot casually dictate terms to it - yet not strong enough to represent the clear threat that it has no intention of being.
United Hindu Collective ~16 Size Class in Service
The UHC is again odd - massive arrays of battlestations, but no ability to project naval power. Its numbers are actually much higher, but recharge stations (by their nature scattered, and of non-military purpose) are not counted. In terms of impact on Naval History, it is anticipated that the UHC will trouble no one, not be worth troubling, and at some point merge with its neighbor to give The Forces of Freedom, Goodness, and Light the Federated Suns an Entirely Unnecessary Leg Up and Advantage over its Neighbors its just rewards for its just nature. :)
Effective Yard Space is the sum of all yards Class 3 or greater, with a half-value given to class 2 yards (class 2 yards are efficient enough to build primary combatants, but inefficient enough that there are real costs to doing so. Class 1 yards are omitted due to inefficiency. Note that Class 2 and 1 yards are given full value for P powers, as they are going to have difficulty production class 3 and larger ships.