B&G H2000 Pilot *DISCONTINUED* - Manual (Page 91)

HB-0845-06 91
3.2.10 Boat Speed Offset Calibration
If a difference in boat speed is indicated from tack to tack, it
is possible to calibrate out the error using an offset table.
It is necessary to first calibrate the boat speed using one of
the methods described previously, it is then important to
establish which tack is providing the correct boat speed, set
the other tack to be the “correction tack” under TACK OFF.
1. Select BOAT SPD on an FFD.
2. Press Enter, then scroll to select CALIBRATE.
3. Scroll to CORRECTN, press Enter.
4. Select TACK OFF, press Enter
5. Set to PORT or STBD.
6. Press Enter to confirm, then scroll up to HEEL.
7. Set the current value for the heel angle.
8. Scroll up to OFFSET PC and enter the percentage
error on this (inaccurate) tack.
The entered percentage offset is applied for angles greater
than, and equal to the entered heel angle, and is interpolated
to 0% at 0 degrees of heel.
3.2.11 Speed Linearity Correction
After the Tack correction is applied it is possible to apply
both Heel Angle and Linearity corrections to the boat speed
data.
The Linearity correction table is provided due to the
characteristics of different speed sensors, a paddlewheel
sensor (for example) is inherently non-linear so at high boat
speeds due to their mechanical nature, they are likely to
over-read and require correction. An Ultrasonic sensor is
linear in its response and does not require significant
correction.