The tracer dart is awesome for killing tanks while in cover. Ping the tank with it, and get into cover. It will then get a red box around it. Hover your sight for the rpg etc over this box and after a few seconds it will give you the distance. (you can do this through walls etc) You are now locked and you can then stay totally hidden behind a wall, fire straight up into the sky and the round will fly up and then arc down onto the tank. Very satisfying when the tank hasnt got a clue where its come from, using either the rpg or gustav, (you cant use the self guiding one). Hope this helps with killing those pesky tanks.. Engineer should pack the tracer dart, rpg or similar, the expanded ammo pouch and high explosive shells. Works wonders