Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments.

Confronted with such facts,some Swedish activists and legislators are demanding more extreme and far-reaching measures, such as replacing male and female pronouns with a neutral alternative and monitoring children more closely to correct them when they gravitate(被吸引) toward gendered play.

In this case, the supervisor may simply need to monitor the employees closely and ensure that the deficiencies are corrected.