Lowrance HDS-5 Gen2 Operation Manual - Page 84

Water Speed Calibration

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Settings Before setting keel offset, measure the distance from the transducer to the lowest part of the keel. If, for example, the keel is 3.5 feet below the transducer, it will be input as -3.5 feet. NOTE: To input a keel offset that accounts for the distance from the transducer to the water surface, you will enter a positive number. If the transducer is 1.5 feet below the waterline, it will be input as +1.5 feet. That will give you a more precise depth reading. To set Keel Offset: 1. Highlight the Keel Offset text box on the Installation menu and press enter. 2. Use the keypad to enter the desired keel offset. Select OK and press enter. Water Speed Calibration When there are differences in speed data, Water Speed Calibration calibrates data from a paddlewheel with GPS data. That ensures the accuracy of speed data from your paddlewheel. Water speed To calibrate Water Speed: calibration dialog box 1. Select the Water Speed Calibration text box from the Installation menu and press enter. The Water Speed Calibration keypad will appear. 2. Use the arrow keys to enter the percentage difference in speed data. Select OK and press enter. NOTE: If the paddlewheel is reading a slower speed than the GPS unit, you will input a positive (+) percentage. Conversely, a negative (-) percentage will be entered if the paddlewheel is reading a faster speed than the GPS unit. 82

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82
Settings
Before setting keel offset, measure the distance from the transducer to the lowest
part of the keel. If, for example, the keel is 3.5 feet below the transducer, it will be
input as –3.5 feet.
To set Keel Offset:
1. Highlight the
Keel Offset
text box
on the Installation menu and press
ENTER
.
2.
Use the keypad to enter the desired keel offset. Select
OK
and press
ENTER
.
Water Speed Calibration
When there are differences in speed data,
Water Speed
Calibration calibrates data from a paddlewheel with GPS
data. That ensures the accuracy of speed data from your
paddlewheel.
To calibrate Water Speed:
1. Select the
Water Speed Calibration
text box from the Installation
menu and press
ENTER
. The Water Speed Calibration keypad will
appear.
2. Use the arrow keys to enter the percentage difference in speed
data. Select
OK
and press
ENTER
.
NOTE:
To input a keel offset that accounts for the distance
from the transducer to the water surface, you will enter a posi-
tive number. If the transducer is 1.5 feet below the waterline,
it will be input as +1.5 feet. That will give you a more precise
depth reading.
Water speed
calibration dialog box
NOTE:
If the paddlewheel is reading a slower speed than the
GPS unit, you will input a positive (+) percentage. Conversely,
a negative (–) percentage will be entered if the paddlewheel is
reading a faster speed than the GPS unit.