VDO Logic Log Depth Montageanleitung Und Bedienungsanleitung Seite 76

For manual calibrations in flowing waters the distance measurement
must also be made in the oposite direction (measuring distance C - D).
The calibation factor is calculated with the formula:
F = -------------------------------------------------------------------------
Do not use the GPS navigator as a reference for the LOGIG
LOG/DEPTH calibration. The GPS navigator displays speed
over ground (SOG), but the LOGIC LOG/DEPTH measures
speed through water.
76
BASIC SETTINGS
Effective distance (A-B) + (C-D)
displayed value (A-B) + (C-D)
Hold down until: