cthia wrote:But I am asking how, exactly is that accomplished? Do the missiles incorporate some sort of highly sensitive gimbal that interfaces with the computer which measures time and acceleration to figure position?
I don't see any reason why it couldn't be accomplished. There's no reason for Chin's fleet to have doubted that Honor was going to hit them. Changing positions after a missile goes ballistic is useless. The question was only how accurate those guesses would be when it came to hitting the ships they were aiming for, instead of hitting any wedge in the wrong proportions.
Let's flay the entire process open and dissect it for a better understanding.
The ships roll pods. The entire gang of pods have to be oriented to the correct bearing, and this orientation has to be performed right up to the moment they are fired since the targets are maneuvering. The ship itself has sensors which have the ability to detect an enemy wedge and then CIC can ascertain range and heading and acceleration. But a missile does not have that level of capability in its onboard sensors.
Why does the pod have to be oriented in any way? With dumb SDMs that can't turn around... maybe. But RMN and GSN ships have been able to fire off-bore for several years now and within a 30° arc or so for over a decade. In fact, the inability to orient was a regression from Travis' times, when the missiles were spit out in front of the ship on rockets before lighting up their wedges, which is when they'd begin their rapid acceleration downrange. But sure, let's say the pods are roughly oriented in the direction of the target... as in "the right quadrant of the sky."
The target ships are manoeuvring, so the detailed targetting to tell a missile "hit this ship" is something only the mothership could provide. But the target grouping of ships, over 10 million km away, isn't going out of angle in any hurry. Even if those ships are moving perpendicularly at 20,000 km/s (81 minutes of acceleration at SLN BC levels), from 10 million km away their angular motion is 0.115°/s or 6.9 arc-minutes/s. I'm going to say the rough tumble of the pod discarding itself makes for more lateral motion than this. So there's no way the missile can miss the grouping of targets.
And missiles have gravitic sensors. Not as refined as the ship, but once told that "this is the set of wedges you're going after," they will start after it and continue after it. They could get confused, for example by those targets passing behind or in front of another group of wedges -- like in basketball when the player with the ball passes behind a teammate who in turn blocks the adversary whose job was to stand in front of the first player. But the chance of this happening in the 4 to 20 minutes of the missiles' flight time is very low.
Even in the age of SDMs missiles had to be led to their targets until they were close enough to begin tracking themselves.
So, I ask again. What possible breakthrough did I miss where it says that missiles can exit the ship knowing where they are in space?
Nothing. They've always been programmed in the tubes to know where they're going. The problem has never been figuring out the rough location of the target ship.
It had been:
(1) losing track of which ship in the target grouping the missile was supposed to strike. In a fleet formation, those ships are performing a dance of going around each other, bringing their wedges up and down in power, and just general EW, in such a way that the missile could get confused between the high-value SD and a low-value DD.
(2) being fooled by decoys. We haven't seen this from the SLN, but we know Lorelei exists now. But that's also a reaction to more capable missiles, so in an age were missiles were more myopic, launching an RD-like vessel with an oversized and overpowered wedge could fool the missile into going after the wrong target.
(3) inability to accurately penetrate the target's defences, especially their EW. The enemy is constantly changing their EW based on past engagements (if they're not stupid). Therefore, adjusting which EW techniques and penaids worked in previous waves is incredibly useful. This was the most difficult problem to solve because of the light-lag in non-FTL sensors, not to mention the lower resolution of shipboard sensors that are tens of millions of km away (RDs help, though).
(4) inability to rebalance the targetting on the fly. Because of all the previous issues, missiles would lose track of which ship they were supposed to hit. That's why CIC had to keep telling them, "no, go after this wedge, forget that one." But it gets worse since there are multiple missiles in flight and they would conceivably all be making the same decisions, thus they could all swarm a single target and overkill it, but leave other targets only lightly-attacked. This is what the ACM solves.