Floating

Floating is a Missile Launcher technique to kill tanks at a distance faster and increase your ability to deal damage. Fire rockets in the clear open area above you, if possible, and head for your target. Your rockets will linger in the air for a few seconds longer than your reload time, allowing you to have up to 4 rockets Floating in the sky until you give them a target on the ground. Be sure to keep your aim clear of the scoreboard or ball above a goal. If they get too far away, simply aim at the ground in front of you to bring them right back to you.

Some more examples are here and a heroic evade here