A leakage or fault path created across the surface of an insulating material when a high-voltage current slowly but steadily forms a carbonized path.

The condition in which all tuned circuits in a receiver accurately follow the frequency indicated by the tuning dial over the entire tuning range.

1. A motion given to the major lobe of a radar or radio antenna such that some preassigned moving target in space is always within the major lobe.

2. The process of following the movements of an object; may be accomplished by keeping the reticle of an optical system or a radar beam on the object, by plotting its bearing and distance at frequent intervals, or by a combination of techniques.

1. The following of a groove by a phonograph needle.

2. Maintaining the same ratio of loudness in the two channels of a stereophonic sound system at all settings of the ganged volume control.

Navigation which follows the movements of a craft but does not anticipate future positions.