Active
Zoom optics
Thermal optics - Let’s hope that snow isn’t hot like it is in COD...
IR Smoke – For when your tank thinks it’s a ninja (counters thermal vision, lasers, prying eyes)
IR Flares - For when you’d rather your Jets and choppers don’t take an unnatural shining to the ground
Laser Painter - Designate a target for laser guided missiles, unclear if you can designate targets for your own ordinance...
Passive
Reactive Armour - Under normal circumstances strapping explosives to your tank would be a bad idea... +10 armour (dammit, this isn't WOW)
Maintenance - Increases ‘auto heal’ rate assumedly, at least until it gets removed because of all the feedback...
Extinguisher - This possibly counters the 'bleed' effect your vehicle suffers when it is disabled. Could be active instead: ‘In the event of fire, press X’...
Belt Speed - Faster rate of fire for machine guns presumably (due to a bad translation possibly track speed increase for tanks/speed increase for ground vehicles in general)
Thermal Camo - Most likely a passive feature to counter thermal optics
Proximity Scan - Name might suggest active but if it is like the specialisation in BC2 that I have never once used or seen used... then passive it is
Auto Loader - Hopefully just increases reload times, manual reload for a tank will drive me insane...
Rocket Guidance System
Below Radar - Cheap perk to stealth up your planes and choppers? Or, more likely, provides a ground scanning radar for aircraft to detect tanks, cars, bears, etc (blame the Swedish language again...)
Beam Scanning - Most likely radar to detect nearby objects/vehicles/missiles or to determine the range of a far off object
ECM Jammer - Electronic Countermeasure for jamming radar or guided missiles, possibly active rather than passive
Air Radar - Possibly active and does a sweep at the press of a button, like ‘proximity scan’
CITV Station - Commander’s Independent Thermal Viewer, used in the Abrams in real life. Since ‘thermal optics’ are also listed this is either a passive feature that auto spots vehicles or it could potentially be used by the passenger in the third seat, which would likely put it in the ‘active’ section.
Weapon
Coaxial Machine Gun
Coaxial Heavy Machine Gun
ATGM Launcher - Anti Tank Guided Missile, like the TOW missile on Bradleys for instance. Alternatively: Air to Ground Missile Launcher... bloody military with their contradictory jargon
Guided Rockets - Possibly for the anti air vehicles, or possibly for air vehicles (laser designated?)
Heatseekers - Air vehicles only I suppose (warning: do not use against Godzilla)
TV Missile - Camera guided, specially designed to hunt down and kill television salesmen, the cunning buggers...
Guided Missile - Fly by wire, laser guided or the infamous pigeon controlled concept from WWII, we just don’t know... Possibly the TOW for the IFVs
Canister Shells - Anti infantry round for tank, basically a large shotgun (and you thought the 40mm one was a beast...)
Guided Shells - Laser guided tank shell (requires someone to laser designate target)
APFSDS-T Shells - Armour-Piercing Fin-Stabilised Discarding Sabot Tracer. Made for tanks, by tanks