Longitudinal guidance.

Calculations for the longitudinal axis of the guidance modes. The control law longitudinal axis input data are: Reference Acceleration, Reference Acceleration Gain, Desired Velocity, Velocity Error Scale Factor. The major output from Longitudinal Guidance is the speed error for the selected longitudinal guidance mode. Low Frequency Automatic Direction Finding (LF ADF). Equipment that determines bearing to a radio station on a low frequency band, usually the standard AM band;