Electric Magnetic Pulse (EMP) items are usable items that temporarily disables all vehicles (including friendly ones) within range. Vehicles which are hit are unable to move and attack for a certain amount of time. Additionally, vehicles hit with a EMP will have their shields reduced to zero. The time and range depends on the type of Item used.
The T38 Ocean Glider, has an EMP Module ability which is not an Item. EMP Module has Range of 10. duration of 1 minute and cooldown of 5 minutes.
The following EMPs are available:
Renders all Units within a certain radius unable to move or fight for a short period.
This list doesn't include the EMP of the T38, neither the pulse used in the campaign missions or the Electromagnetic Generator.