So MIUs arent normally wireless?
They really need to say things like that.
They do.A basic MIU implant involves a single spinal or cortex connector, while advanced variants include wrist connector probes—and possibly mechadendrite connectors—in addition to the spinal plug.
Wireless is not particularly common in the Imperium (any more), particularly outside Mechanicus-controlled areas (Forge Worlds, Mechanicus vessals, etc) and
especially in battlefield roles, because they're too big a security risk with things like the Dark Mechanicum and Scrapcode floating around. It's bad enough when Daemons can spread through your network via direct interfaces.
Point the first: We have two chimeras. Talking loudly is not likely to be louder than that.
Since when? Im rather certain we decided to have one group and one chimera, and then decant sub-units about. mostly because we have one operator.
Did we? I guess that saves me buying Operate (Surface) or us having a driver NPC.
So could, say, two people with MIUs connect to the same thing and use that as an interface to communicate with eachother?
Potentially, but
why? If you have access to that you almost certainly have access to more direct methods.
MIUs really don't work that way. They connect a person's brain to technology, they can't connect two people's brains together and to attempt to do so would probably have severely bad effects because you just set both of your brains calculating the information and input from two brains at once. The most common usage of MIUs is to allow the near-dead Astartes to control the dreadnoughts from within their walking coffins, and to allow tech-priests and the pilot of a Titan to better interface with such a massive warmachine.
Well, that's not really true. Dreadnoughts and Titans are both far less common than all the other uses for them, like the near-innumerable Tech Priests using them to plug into things on Forge Worlds, the captains or pilots of starships that use the advanced models to connect to their ships, etc. Oh, and according to Only War the guardsmen that plug into their tanks.
*shrug*Also, I have no idea where you got "you just set both of your brains calculating the information and input from two brains at once" from. There's nothing that suggests that MIUs work by making a digital model of the thing you are linked to and making that model run. It'd likely just be a slower and more inefficient method of transferring data between individuals, which the Mechanicus already has plenty of ways to do.