Furuno SFD-1010 Operator's Manual page 222

5. INSTALLATION
[CALC-SPD-
POSN Z (Height)]
Note: For other details, refer to the Operator's Manual of the each model.
5-40
5-38
docking, these two values should be adjusted as required.
For all vessels, [CALC-SPD-Z] should be set to the vessel's draft
value.
For further information, contact a FURUNO dealer.
Set the height for calculating the 3-axis speed. Enter the distance
from the bottom of the ship to the position where you want to
measure the ship's speed.
For example, enter the draft value when you want to measure the
speed at draft position.