cthia wrote:It's basically like standing near your helpless daughter while you return fire at intruders with automatic weapons. No, you put your daughter down somewhere safe and say "Stay here honey. I'll be back."
The analogy isn't very good if the defender in question had very good CM defences. The missiles aren't THAT dumb always go for the planet. In pre-MDM days, when decisive fighting was mostly on energy weapons, they'd make a lot of sense.
That would be like your analogy, whereas placing the fort tens of millions of km away would be "Stay there honey, I'll go fight in another continent and be back next year".
Close, yes. So it'll be obvious to an attacker it is defended. But dangerously close? No.
Ok, I'm just going to get this load off my chest and go ahead and say it. I've always thought orbital forts are a waste of resources. They're basically useless. They can't engage anything for risk of getting the family killed. Orbital forts remind me of a knight on the chess board which has been rendered useless because it is penned between an attacker and the King or Queen. Which is exactly the case of orbital forts.
You may be right that they are a waste of resources. RFC may provide a rationale in-Universe why that was the conclusion. It might be possible to pay for two or three SDs for the price of one fort, which gives the defender more flexibility.
But I don't buy that they are useless. If you replace the orbiting fort with an SD that happened to be out of the initial fight, would you still say it shouldn't engage for fear of return fire landing on the planet? We did see a lot of ships either hiding behind planets or firing (or at least engaging in defensive action) while in proximity of them.
I've always envisioned orbital forts as being the first line of defense, although it never seemed to be the case. Why the hell aren't massive installations like forts where huge amounts of resources have been invested and are heavily laden with missiles, not positioned on the front line? Forts should be the first thing an invading fleet encounters. All thru history, the first thing an invader has to overcome is the fort. And they have to throw everything they have at it before they could engage the city. A navy should have to deal with an enemy fleet only after it has fought its way thru forts. Perhaps this wasn't possible before the age of MDMs and Apollo. But Apollo certainly makes the point now. In fact, Apollo finally allows the notion of a fort to realize it's true calling. Without Apollo, a fort seems obsolete and a total waste of resources.
Because space is vast. You can't fortify the necessary volume so that they are the first line of defence for a system that has asteroid mining and other ship traffic. Don't forget the 3D component: an attacking force can simply go out of the ecliptic and bypass the ring of forts the same way an aeroplane can bypass a naval fort that doesn't have SAMs.
A better approach would be to create shells around important assets, leaving everything else to be defended by mobile forces. I can understand your desire to place the forts far enough away that stray missiles won't threaten the planet. That still doesn't solve the problem of an enemy that happens to find itself on the same direct line between the planet and the defensive position. For that, you need a second line of defensive installation that can pick up stray missiles.
That is, a second line of forts, closer to the planet.
Let's think about this. You cannot engage a planet until you control the orbitals. You don't control the orbitals if there are forts in orbit. But who in their right mind is going to get near a fort to take a beating if they've dispensed with the enemy fleet. If there is no one left to oppose you other than the forts, you should be able to demand a fort to either surrender or be fired upon. From a distance.
We go back to the discussion of how close a civilian must be to be considered human shield.
Is 100,000 km far enough away? How about 1 million? How about 10 million?