The real way to know where someone is, is to look at the map on the wiiu, and if anyone is at the spawn point on your team, you can see where the opponets are for a time, I.E about... 2 seconds or less, so if you use gear with recon, its best to have the best weapon that can reach far range like a charger, and as well as specials too, ( inkstrike, killer-wail, inkzooka, or even a kracken. )
Also echolocation is cool, if you have a lot of these:
, but if you do have a lot of special charge up, it's like one after another, especially with a n-zap 89 or custom splattershot jr, or, bamboozeler, can be efficient weapons.