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Plenty of misconception about both this skill, so i make this thread to compile people opinion and who know if someone who know better than me about game mechanic show up.

What i know about BIA + Vent
1. Vent + BIA each add 5% skill crew for total 10%. If we have both it will make our crew skill to 121%.
2. Based on wiki comparing old stat at 133% and new stat at 100%, thing affect by BIA + Vent is rate of fire, accuracy, aim time, view range, radio range, turret traverse, signal range.
3. BIA also affect secondary skill, fire fighting, camo and repair.
4. There is some doubt about BIA future, if it will stay the same or not (wounded crew stop BIA from working)

My question
1. What else that BIA + vent affect? Acceleration, accuracy dispersion when move, terrain resistance?
2. Is vent also affect secondary skill (fire fighting, camo and repair) like BIA?
3. Anyone from Russia forum can clarify future BIA status?

For me personally both BIA and Vent worth it, i put it in all my medium and heavy tank. It have quite an impact on large amount of stat, for example BIA + vent improved IS4 accuracy to almost as good as KT with 88l71.

edit: add another option on poll, don't use both.

Bia affects your drivers primary skill so yes acceleration and rough terrain driving are effected same with dispersion and tiering on move Bia effect everything

BIA is basically another vents that stacks well with vents. It even says so in the description of BIA that it works well with vents.

Because BiA is a perk, I've only used it on tanks that had an open 100% skill slot ready to go.  I like it, and I'll add it to more later, but I figured I'd get more immediate benefit out of Skills on some tanks instead of waiting to grind out BiA.

I always put Vents on every tank that can mount them.

Like everything else it depends what you do with it. If you use every aspect of tank throughout fight, and you think tank would benefit in all areas, use either both. If tank's biggest weakness is gun, vision, HE, getting spotted, load time, frequent module dmg, use the specialized skills and equipment instead.

Vents and BIA is the only way to boost the tank's base handling apart from consumables, so if that's tank's primary focus or handicap, it's an easy pick. If you sit and shoot a lot and don't ever feel held back by mobility, other skills and equip might have more impact. Or you might want to use them along with BIA vents and skip repair or camo instead. It depends on player and tank.

I'm the only one on BiA only it seems, to me vents take the spot of other possible utilities, BIA doesn't. They both do the same thing. For me there's Rammer, Vert Stabilizer, Vents, GLD, Binocs (depending on tank), camo net. (depending on tank). More than enough options to sub out the vents, not so much greatness on skills to content with BIA. You get Repairs, and camo net, both tank dependent. The others are mostly crap.

DarkElf, on May 10 2012 - 13:11, said:

Not accuracy, or turret traverse, but it does affect leadership (boosting all skills again).

Garbad, on May 10 2012 - 20:18, said:

It does affect accuracy and turret traverse, both of which are dependent on the skills of the gunner.

Riceygringo, on May 10 2012 - 20:21, said:

I was wrong, according to wiki you can affect:

- commander - view range, leadership
- driver - top speed, traverse, acceleration
- loader - loading only
- gunner - aiming time, dispersion, turret traverse
- radio - radio range

So lots of little things that add up. Much like vents vs. rammer or w/e, you have to debate what you prefer.

Beerstein, on May 10 2012 - 20:17, said:

+1

There are a few exceptions where I can see BIA + Vents being useful, for now, it is an alternative to vents that allows me to save an equipment slot.

I have 46 tanks, I like BIA, BUT I have only put it on one tank so far!  Why?  Because it takes 1 full 100% skill from EVERY crew member to have it.
On any crew with 3.5 additional skills each I will most likely reset all skills with gold and give them BIA. Why?  Because I think it provides a very definite & real benefit to the tank's performance.
I also have vents on pretty much every tank that can have vents - I think it is worth one of the 3 equipment slots.
Vents gives my HT crews more primary skills and also improves the repair skill, it gives my LT tank crews more primary skills and also imporves their camo skill, same with the MT, TD & SPG crews - each have either camo or repair as an important skill.

Is it useful for an arty to be able to load quicker & aim quicker?  Then get a rammer & GLD!  If it can take it then add vents too.  If the crew have the skills available then get BIA as well.  Once I have 2.5 additional skills on arty then I'll look at BIA.  Commander would go with BIA at 100%, Sixth sense at 100% and then camo.  Driver would go with BIA + Clutch Braking + camo.  The rest would go with BIA + Camo + whatever.

I've put BIA on a lot of tanks, but I need to remember that they don't necessarily help with everything. I got them on a lot of tanks with long reload times because...well...try to bring it down. On other vehicles that are already good, I try to just stick with Vents. Anything in UC will have BIA and Vents, however, especially when it comes to French tanks. My 50B has some specialties, and is now working on BIA, but it also has Vents. It's a really good multiplier.

I put BiA as the first skill on most of my crews once they reach 100%. It improves most aspects of a tank's performance and as the first skill it doesn't take too long to level to 100%. I put vents on a lot of my tanks, especially ones with long reload times or poor acceleration/traverse. Every little bit helps.

I use both, and I use them whenever possible.    I'll keep using them unless it's somehow proven not to be good.   As it is now, I can tell a small difference in BIA and not having it.   When I leveled my IS-3 I had BIA.   When I leveled out of it into the IS-4, I transfered crew with it, but kept the IS-3 and put a new crew on it.   Small but noticable difference.

Not to mention I love knowing that if I'm fighting another tank that is same as my tank, I'm always going to be the first to fire the next shot, or atleast fire as quickly as they will.

As for only using 1.  Why?  If 1 of them is good, then 2 of them should be even better.    I suppose maybe some situations, but in general I can't see myself doing it.    So far I haven't found any such situations, so much as I have found vent not being available.

The only time I only use BIA would be because vent is not available. Haven't had that happen yet because I only have 2 crews with BIA so far. What sucks about BIA is it doesn't work at all until 100%, so you either gotta pay gold for a respec, or sit there with no bonus while it levels up, or lose exp points in a non gold respec.   I personally pay gold because exp doesn't come easy, and it would drive me nuts not getting any bonus until 100%.

If they change the crew dead thing, then I would have to seriously reconsider BIA.    But as for now, I think it's basically a must have for any tank, along with vent when available. Crew skills are IMO among the most important aspects of the game.    Go play some t1/t2 with 100% crews vs a bunch of people with 50% crews and it's not like you are even in the same tanks they are.

Beerstein, on May 10 2012 - 20:17, said:

I picked the same. I only use vents on tanks that can't use a Rammer or Vstab/GLD(arty). So tier 2 lights, and the Amx 13 75. Everything else gets Binos, Rammer, Vstab and possibly camo net.

A big question is, are the stats displayed now bases off just every crew having 100%, or does that assume your crew is at 110%, counting commander bonus?

Okeano, on May 16 2012 - 03:59, said:

My quess it's 110%, adding BIA and vent bring it to 121%, add gold consumable for the last 10% to reach the tank full potential at 133%.

I would assume for a tank that is jack of all trades and master of none the bia+vent would be an excelent combination. I might just have to try it on my type 59.

Okeano, on May 16 2012 - 03:59, said:

it's 100%

DarkElf, on May 16 2012 - 04:09, said:

But 133% existed before BIA, so how was it possible to obtain 133 with gold cosumable? 115% crew from vent and consum is 126.5 adding commander bonus. What am I missing here?

We know the stats of tank with 133% compare to what is now (need to confirm base off 100% or 110%), we can interpolate what tank stats would be at 121% crew and get a clear benefit of vents and BIA on tank. To convert from 133% crew to now is multiply things by 1.25/0.75 or was it 1.2/0.8?