A brain, Pair of Eyes and some knowledge of the game.

When joining a game there a Tab called Crew Setup, when you click the tab it will show you all players loadouts (yes, yes amazing). With this info you will know whether its stealth or... ...

Ok. So now you know how to see the other players loadouts you can begin to think about which loadout you will take.

What to look for in players loadsouts:
Suits
Silenced weapons
Low detection
ECM's

Stealth will look like this:















PS: Dont mind the medic bag...this is where i joined.

Right, stealth is out of the way now how to tell of players are playing loud.

What to look for in players loadsouts:
Armour
Suits (dodge builds, lookout for the weapons they're using)
Heavy weapons
Highly modified
High detection
Low detection (dodge builds, again look for the weapons being used)
Ammo bags, Medic bags, First Aid Kits and Sentry gun.

Loud will look like this: (Yellow indicated something that resembles stealth)














You can see I have 6 detection but im carrying a GL (sometimes used for stealth) but my sidearm doesn't have a silencer which indicates im not stealthing. If you see 3 people with the same build...take a loud build. Also you can see me and the other player using a suit even though he has 75 detection which indicated he's running a dodge build.