USS Defender (MCM-2) was an Avenger-class mine countermeasures ship in the service of the United States Navy.

As of 1 July 2009, she was active in Mine Countermeasures Squadron Seven, U.S. Pacific Fleet, permanently forward deployed to Sasebo, Japan.

[1] Auxiliary systems: three Waukesha ship service diesel generator sets, one solar gas turbine generator, one omnithruster bow thruster system.

Electronic systems: one AN/SSN-2 Precise Integrated Navigation System (PINS), one AN/SQQ-32 Mine Hunting Sonar, one AN/SPS-55 Surface Radar, one AN/WSN-7 Gyro compass, Mine Countermeasure Equipment Suite, one AN/SLQ-48 (V) Mine Neutralization System, one AN/SQL-37 (V) 3 Magnetic/Acoustic Influence Minesweeping Gear, Oropesa type 0 size 1 Mechanical Sweep Equipment, MDG 1701 Marconi Magnetometer Degaussing System.

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.