In February 2009, Northrop Grumman passed Verification Compliance Review (VCR) -1, which audited the company's testing of the B-2 radar's hardware and basic operational modes.

The B&K accelerometer and hydrophone were used for the measurement of the cavitation noise and vibration at different part of jet pump under different operating modes.

Automatic dependent surveillance-broadcast (ADS-B) and automatic dependent surveillance-contract (ADS-C) are two different air traffic control surveillance modes.