About Direction_horizontal

Direction_horizontal is an analysis export variable available in exported fish track analyses.

It reports the horizontal component direction in degrees, of the vector drawn between the positions of first and last target in a fish track region. See About beam geometry for a definition of the horizontal direction.

This variable is exported only if it is selected on the Export page of the EV File Properties dialog box.

Notes:

Under a mobile platform the position of the target considers the target GPS data. Under a fixed platform target positions are positions within the transducer beam.
Under a fixed platform, consider using Heading source: Fixed heading (north) for a more appropriate reference for fish track distance and speed calculations. For more information refer to About fish tracks: Notes.
See also Calculation precision and cardinal points.

About Direction_horizontal

See also