Calibration 29
Depth units
You can set either FEET or METRES.
Depth offset
WARNING:
The use of incorrect offset values could result in misleading depth
information being displayed with a consequent risk of running
aground.
Depths are measured from the transducer to the sea bed. However, you can use
the depth offset screen to apply offsets to this distance, so that the displayed
depth reading represents either the depth from the keel or the depth from the
water line. In order to do this, you need to know the vertical separation between
the transducer position and:
• The bottom of the keel.
• The water line.
Use the
trip (decrement) and reset (increment) keys to set the required offset
value:
User calibration - depth
From User calibration
start screen
depth
depth
depth
Set depth
units
Set depth
offset
Shallow
alarm lock
D4417-1
81040_5.book Page 29 Monday, February 20, 2006 2:39 PM
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