So theoretically a small craft with say 10mkm Active Sensor Range could "mark" a target and be shot at by from a different ship with a long range Missile Fire Control of 200mkm and as long as the small craft keeps active contact... 

Just out of curiosity. If the MFC is not the thing keeping track of the enemy ship why did Steve create it basically with having 3x longer range (if you create an identical size and component MFC / ASS)? Is there a special function of it having a theoretical longer range other than my described two ship setup?

First half. Yes you can use active spotting craft far ahead of the fleet keeping the actual fleet safe from detection.

Second half. Probably so that you can do the above more easily. Also you could argue that the MFC is a directed narrow beam sensor rather than the omnidirectional active sensor.

So theoretically a small craft with say 10mkm Active Sensor Range could "mark" a target and be shot at by from a different ship with a long range Missile Fire Control of 200mkm and as long as the small craft keeps active contact... 

Just out of curiosity. If the MFC is not the thing keeping track of the enemy ship why did Steve create it basically with having 3x longer range (if you create an identical size and component MFC / ASS)? Is there a special function of it having a theoretical longer range other than my described two ship setup?

No if you are targeting a ship the target is lost and your missiles are no longer guided. The exception is if you are targeting a waypoint, then you can fire without active sensors.

I know you need a missile fire control AND active sensor, but why does the missile fire control need the same active sensor technology and resolution technology as the active sensor? Why doesn't it have similar features tot he beam fire controls? How do the missiles use this?

As in real life, a missile fire control system is a specialised active sensor intended to track known targets rather than search for new ones. If you do a google search for "Search Radar" and for "Fire Control Radar", that will explain the differences.

Steve

I know you need a missile fire control AND active sensor, but why does the missile fire control need the same active sensor technology and resolution technology as the active sensor? Why doesn't it have similar features tot he beam fire controls? How do the missiles use this?