Warp Jammers

Faint Epsilon Warp Scrambler I		Faint Warp Disruptor I
Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.		Disrupts the target ship's navigation computer which prevents it from warping.
Fleeting Progressive Warp Scrambler I		Fleeting Warp Disruptor I
Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.		Disrupts the target ship's navigation computer which prevents it from warping.
Initiated Harmonic Warp Scrambler I		Initiated Warp Disruptor I
Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.		Disrupts the target ship's navigation computer which prevents it from warping.
Interdiction Sphere Launcher I		J5 Prototype Warp Disruptor I
Built for use with interdictor-class vessels, this launcher produces a warp disruption sphere...		Disrupts the target ship's navigation computer which prevents it from warping.
J5b Phased Prototype Warp Scrambler I		Warp Disruptor I
Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.		Disrupts the target ship's navigation computer which prevents it from warping.
Warp Disruptor II		Warp Scrambler I
Disrupts the target ship's navigation computer which prevents it from warping.		Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.
Warp Scrambler II
Disrupts the target ship's navigation computer which prevents it from warping or using a microwarpdrive.

NOTE: These are Mid slot items except for the Interdiction Sphere Launcher which is a High slot item.