A tactic invented by Jean-Luc Picard aboard the Stargazer, in which a short burst of warp speed makes a ship seem to be in two places at once.
The Picard Manoeuvre is a battle tactic that takes advantage of the speed of light. A ship jumps to high warp for an instant and stops right beside its enemy. For a moment the enemy's sensors still show the ship where it was, so that it seems to be in two places, and the attacker fires before the confusion clears.
Picard devised it in 2355 at Maxia Zeta, when the USS Stargazer was crippled by an unidentified attacker. The manoeuvre destroyed the enemy, which was later found to be a Ferengi ship, and it went on to be taught at Starfleet Academy.
In The Battle, DaiMon Bok uses a mind-altering device to make Picard relive the fight aboard the recovered Stargazer and turn the tactic on the Enterprise. Data works out a counter: the ship's sensors pick out the true Stargazer by the gas it compresses, and a tractor beam holds it fast.