USNS Howard O. Lorenzen (T-AGM-25) is a Missile Range Instrumentation Ship built for the U.S. Navy by VT Halter Marine of Pascagoula, Mississippi.

The ship is named for the late Naval Research Laboratory (NRL) electrical engineer who was instrumental in the creation of the electronic intelligence capabilities of the United States.

The ship was judged inadequate in the electrical, damage control and aviation inspections and also had problems with her anchor, steering and the temperature in her thrust bearings.

[8] Final contract trials were completed on 5 December 2013, with transfer of some responsibilities for the ship to the US Air Force expected to occur in 2014.

According to the Naval Sea Systems Command (NAVSEA), the U.S. Air Force also assumed operational and sustainment responsibilities for the ship with the goal of enhancing missile defense through the use of its powerful radar to create dead areas in low earth orbit to scramble a ballistic missile's electronics prior to last stage separation of MIRVs, thus rendering their proximity fuses inert.